<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cbba8-0528-7eb8-a967-f07dd1c5d759,g:cbd54f26-db03-42cb-98f5-1213fb8bcfe4-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:gct="http://gig.com/20260331" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://gig.com/20260331">
  <xs:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gct-20260331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gct-20260331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gct-20260331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gct-20260331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://gig.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME">
        <link:definition>9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEParenthetical" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEParenthetical">
        <link:definition>9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY">
        <link:definition>9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS&#8217; EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical">
        <link:definition>9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS&#8217; EQUITY (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://gig.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952157 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES">
        <link:definition>9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATION" roleURI="http://gig.com/role/BUSINESSCOMBINATION">
        <link:definition>9952159 - Disclosure - BUSINESS COMBINATION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTS" roleURI="http://gig.com/role/FAIRVALUEMEASUREMENTS">
        <link:definition>9952160 - Disclosure - FAIR VALUE MEASUREMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCOUNTSRECEIVABLENET" roleURI="http://gig.com/role/ACCOUNTSRECEIVABLENET">
        <link:definition>9952161 - Disclosure - ACCOUNTS RECEIVABLE, NET</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIES" roleURI="http://gig.com/role/INVENTORIES">
        <link:definition>9952162 - Disclosure - INVENTORIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASES" roleURI="http://gig.com/role/LEASES">
        <link:definition>9952163 - Disclosure - LEASES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ORDINARYSHARES" roleURI="http://gig.com/role/ORDINARYSHARES">
        <link:definition>9952164 - Disclosure - ORDINARY SHARES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREBASEDCOMPENSATION" roleURI="http://gig.com/role/SHAREBASEDCOMPENSATION">
        <link:definition>9952165 - Disclosure - SHARE-BASED COMPENSATION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAX" roleURI="http://gig.com/role/INCOMETAX">
        <link:definition>9952166 - Disclosure - INCOME TAX</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NETINCOMEPERORDINARYSHARE" roleURI="http://gig.com/role/NETINCOMEPERORDINARYSHARE">
        <link:definition>9952167 - Disclosure - NET INCOME PER ORDINARY SHARE</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUES" roleURI="http://gig.com/role/REVENUES">
        <link:definition>9952168 - Disclosure - REVENUES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIES" roleURI="http://gig.com/role/COMMITMENTSANDCONTINGENCIES">
        <link:definition>9952169 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUBSEQUENTEVENTS" roleURI="http://gig.com/role/SUBSEQUENTEVENTS">
        <link:definition>9952170 - Disclosure - SUBSEQUENT EVENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies">
        <link:definition>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables">
        <link:definition>9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONTables" roleURI="http://gig.com/role/BUSINESSCOMBINATIONTables">
        <link:definition>9955513 - Disclosure - BUSINESS COMBINATION (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSTables" roleURI="http://gig.com/role/FAIRVALUEMEASUREMENTSTables">
        <link:definition>9955514 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCOUNTSRECEIVABLENETTables" roleURI="http://gig.com/role/ACCOUNTSRECEIVABLENETTables">
        <link:definition>9955515 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIESTables" roleURI="http://gig.com/role/INVENTORIESTables">
        <link:definition>9955516 - Disclosure - INVENTORIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESTables" roleURI="http://gig.com/role/LEASESTables">
        <link:definition>9955517 - Disclosure - LEASES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ORDINARYSHARESTables" roleURI="http://gig.com/role/ORDINARYSHARESTables">
        <link:definition>9955518 - Disclosure - ORDINARY SHARES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREBASEDCOMPENSATIONTables" roleURI="http://gig.com/role/SHAREBASEDCOMPENSATIONTables">
        <link:definition>9955519 - Disclosure - SHARE-BASED COMPENSATION (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NETINCOMEPERORDINARYSHARETables" roleURI="http://gig.com/role/NETINCOMEPERORDINARYSHARETables">
        <link:definition>9955520 - Disclosure - NET INCOME PER ORDINARY SHARE (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUESTables" roleURI="http://gig.com/role/REVENUESTables">
        <link:definition>9955521 - Disclosure - REVENUES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofReconciliationofCashandRestrictedCashDetails" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofReconciliationofCashandRestrictedCashDetails">
        <link:definition>9955522 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Reconciliation of Cash and Restricted Cash (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofAccountsReceivableBalanceDetails" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofAccountsReceivableBalanceDetails">
        <link:definition>9955523 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Accounts Receivable Balance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetails" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESAdditionalInformationDetails">
        <link:definition>9955524 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofLonglivedAssetsbySegmentDetails" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofLonglivedAssetsbySegmentDetails">
        <link:definition>9955525 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Long-lived Assets by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofGeographicinformationofRevenuebySegmentDetails" roleURI="http://gig.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofGeographicinformationofRevenuebySegmentDetails">
        <link:definition>9955526 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Geographic information of Revenue by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONNarrativeDetails" roleURI="http://gig.com/role/BUSINESSCOMBINATIONNarrativeDetails">
        <link:definition>9955527 - Disclosure - BUSINESS COMBINATION - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONScheduleofBusinessCombinationRecognizedAssetAcquiredandLiabilityAssumedDetails" roleURI="http://gig.com/role/BUSINESSCOMBINATIONScheduleofBusinessCombinationRecognizedAssetAcquiredandLiabilityAssumedDetails">
        <link:definition>9955528 - Disclosure - BUSINESS COMBINATION - Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONScheduleofConsiderationPaidDetails" roleURI="http://gig.com/role/BUSINESSCOMBINATIONScheduleofConsiderationPaidDetails">
        <link:definition>9955529 - Disclosure - BUSINESS COMBINATION - Schedule of Consideration Paid (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSScheduleofFairValuebyBalanceSheetGroupingDetails" roleURI="http://gig.com/role/FAIRVALUEMEASUREMENTSScheduleofFairValuebyBalanceSheetGroupingDetails">
        <link:definition>9955530 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Fair Value, by Balance Sheet Grouping (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSNarrativeDetails" roleURI="http://gig.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails">
        <link:definition>9955531 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEMEASUREMENTSScheduleofContingentConsiderationDetails" roleURI="http://gig.com/role/FAIRVALUEMEASUREMENTSScheduleofContingentConsiderationDetails">
        <link:definition>9955532 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Contingent Consideration (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCOUNTSRECEIVABLENETScheduleofAccountsReceivableNetDetails" roleURI="http://gig.com/role/ACCOUNTSRECEIVABLENETScheduleofAccountsReceivableNetDetails">
        <link:definition>9955533 - Disclosure - ACCOUNTS RECEIVABLE, NET - Schedule of Accounts Receivable Net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCOUNTSRECEIVABLENETScheduleofMovementoftheAllowanceforCreditLossesDetails" roleURI="http://gig.com/role/ACCOUNTSRECEIVABLENETScheduleofMovementoftheAllowanceforCreditLossesDetails">
        <link:definition>9955534 - Disclosure - ACCOUNTS RECEIVABLE, NET - Schedule of Movement of the Allowance for Credit Losses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIESDetails" roleURI="http://gig.com/role/INVENTORIESDetails">
        <link:definition>9955535 - Disclosure - INVENTORIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESAdditionalinformationDetails" roleURI="http://gig.com/role/LEASESAdditionalinformationDetails">
        <link:definition>9955536 - Disclosure - LEASES - Additional information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofAssetsandLiabilitiesRelatedtobothOperatingandFinanceLeasesDetails" roleURI="http://gig.com/role/LEASESScheduleofAssetsandLiabilitiesRelatedtobothOperatingandFinanceLeasesDetails">
        <link:definition>9955537 - Disclosure - LEASES - Schedule of Assets and Liabilities Related to both Operating and Finance Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofLeaseCostDetails" roleURI="http://gig.com/role/LEASESScheduleofLeaseCostDetails">
        <link:definition>9955538 - Disclosure - LEASES - Schedule of Lease Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofLeaseTermsandDiscountRatesDetails" roleURI="http://gig.com/role/LEASESScheduleofLeaseTermsandDiscountRatesDetails">
        <link:definition>9955539 - Disclosure - LEASES - Schedule of Lease Terms and Discount Rates (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofFutureMinimumLeasePaymentsDetails" roleURI="http://gig.com/role/LEASESScheduleofFutureMinimumLeasePaymentsDetails">
        <link:definition>9955540 - Disclosure - LEASES - Schedule of Future Minimum Lease Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofFutureMinimumLeasePaymentsDetails_1" roleURI="http://gig.com/role/LEASESScheduleofFutureMinimumLeasePaymentsDetails_1">
        <link:definition>9955540 - Disclosure - LEASES - Schedule of Future Minimum Lease Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ORDINARYSHARESAdditionalInformationDetails" roleURI="http://gig.com/role/ORDINARYSHARESAdditionalInformationDetails">
        <link:definition>9955541 - Disclosure - ORDINARY SHARES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ORDINARYSHARESScheduleofTreasurySharesRepurchasedandReissuedDetails" roleURI="http://gig.com/role/ORDINARYSHARESScheduleofTreasurySharesRepurchasedandReissuedDetails">
        <link:definition>9955542 - Disclosure - ORDINARY SHARES - Schedule of Treasury Shares Repurchased and Reissued (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREBASEDCOMPENSATIONScheduleofShareBasedPaymentArrangementRestrictedStockandRestrictedStockUnitActivityDetails" roleURI="http://gig.com/role/SHAREBASEDCOMPENSATIONScheduleofShareBasedPaymentArrangementRestrictedStockandRestrictedStockUnitActivityDetails">
        <link:definition>9955543 - Disclosure - SHARE-BASED COMPENSATION - Schedule of Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SHAREBASEDCOMPENSATIONScheduleofCompenstionExpensesRecognizedDetails" roleURI="http://gig.com/role/SHAREBASEDCOMPENSATIONScheduleofCompenstionExpensesRecognizedDetails">
        <link:definition>9955544 - Disclosure - SHARE-BASED COMPENSATION - Schedule of Compenstion Expenses Recognized (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IINCOMETAXDetails" roleURI="http://gig.com/role/IINCOMETAXDetails">
        <link:definition>9955545 - Disclosure - IINCOME TAX (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NETINCOMEPERORDINARYSHAREScheduleoftheBasicandDilutedNetIncomeperOrdinaryShareDetails" roleURI="http://gig.com/role/NETINCOMEPERORDINARYSHAREScheduleoftheBasicandDilutedNetIncomeperOrdinaryShareDetails">
        <link:definition>9955546 - Disclosure - NET INCOME PER ORDINARY SHARE - Schedule of the Basic and Diluted Net Income per Ordinary Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NETINCOMEPERORDINARYSHAREScheduleofDilutiveSecuritiesonNetIncomePerShareDetails" roleURI="http://gig.com/role/NETINCOMEPERORDINARYSHAREScheduleofDilutiveSecuritiesonNetIncomePerShareDetails">
        <link:definition>9955547 - Disclosure - NET INCOME PER ORDINARY SHARE - Schedule of Dilutive Securities on Net Income Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUESScheduleofRevenuesareDisaggregatedbyMajorProductsServiceLinesandTimingofRevenueRecognitionDetails" roleURI="http://gig.com/role/REVENUESScheduleofRevenuesareDisaggregatedbyMajorProductsServiceLinesandTimingofRevenueRecognitionDetails">
        <link:definition>9955548 - Disclosure - REVENUES - Schedule of Revenues are Disaggregated by Major Products/Service Lines and Timing of Revenue Recognition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUESScheduleofChangesinContractLiabilitiesBalancesDetails" roleURI="http://gig.com/role/REVENUESScheduleofChangesinContractLiabilitiesBalancesDetails">
        <link:definition>9955549 - Disclosure - REVENUES - Schedule of Changes in Contract Liabilities Balances (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUESAdditionalInformationDetails" roleURI="http://gig.com/role/REVENUESAdditionalInformationDetails">
        <link:definition>9955550 - Disclosure - REVENUES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUBSEQUENTEVENTSDetails" roleURI="http://gig.com/role/SUBSEQUENTEVENTSDetails">
        <link:definition>9955551 - Disclosure - SUBSEQUENT EVENTS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="gct_AccruedLiabilitiesAndOtherCurrentLiabilities" abstract="false" name="AccruedLiabilitiesAndOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ContingentConsiderationLiabilityNoncurrent" abstract="false" name="ContingentConsiderationLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_CostOfRevenues" abstract="false" name="CostOfRevenues" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ConversionOfOrdinarySharesFromClassBToClassAMember" abstract="true" name="ConversionOfOrdinarySharesFromClassBToClassAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherCurrentLiabilities" abstract="false" name="IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherCurrentLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ScheduleOfReconciliationOfCashAndRestrictedCashTableTextBlock" abstract="false" name="ScheduleOfReconciliationOfCashAndRestrictedCashTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_DisclosureInTabularFormOfConcentrationRiskPercentageInRespectOfAccountsReceivableDueFromCustomerPolicyTextBlock" abstract="false" name="DisclosureInTabularFormOfConcentrationRiskPercentageInRespectOfAccountsReceivableDueFromCustomerPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_ScheduleOfAssetsAndLiabilitiesRelatedToBothOperatingAndFinanceLeasesTableTextBlock" abstract="false" name="ScheduleOfAssetsAndLiabilitiesRelatedToBothOperatingAndFinanceLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_LeaseTermsAndDiscountRatesTableTextBlock" abstract="false" name="LeaseTermsAndDiscountRatesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_ScheduleOfFutureMinimumLeasePaymentsTableTextBlock" abstract="false" name="ScheduleOfFutureMinimumLeasePaymentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_ContractWithCustomerLiabilityTableTextBlock" abstract="false" name="ContractWithCustomerLiabilityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gct_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_AccountingPoliciesTable" abstract="true" name="AccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gct_PurchasesMember" abstract="true" name="PurchasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_OneSupplierMember" abstract="true" name="OneSupplierMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_AccountingPoliciesLineItems" abstract="true" name="AccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_PlatformCommissionMember" abstract="true" name="PlatformCommissionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_OceanTransportationServiceMember" abstract="true" name="OceanTransportationServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_DrayageServiceMember" abstract="true" name="DrayageServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_WarehousingServiceMember" abstract="true" name="WarehousingServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_PackagingServiceMember" abstract="true" name="PackagingServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_LastMileDeliveryServiceMember" abstract="true" name="LastMileDeliveryServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_OthersMember" abstract="true" name="OthersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_NewClassicHomeFurnishingsIncNewClassicMember" abstract="true" name="NewClassicHomeFurnishingsIncNewClassicMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_BusinessCombinationContingentConsiderationEarnoutProvisionRevenueRange" abstract="false" name="BusinessCombinationContingentConsiderationEarnoutProvisionRevenueRange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_BusinessCombinationContingentConsiderationEarnoutProvisionRevenueTerm" abstract="false" name="BusinessCombinationContingentConsiderationEarnoutProvisionRevenueTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gct_BusinessCombinationRecognizedAssetsAcquiredOperatingLeaseRightOfUseAssets" abstract="false" name="BusinessCombinationRecognizedAssetsAcquiredOperatingLeaseRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesCurrent" abstract="false" name="BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherCurrentLiabilities" abstract="false" name="BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesNonCurrent" abstract="false" name="BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesNonCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_BusinessCombinationRecognizedLiabilitiesAssumedFinanceLeaseObligationsNonCurrent" abstract="false" name="BusinessCombinationRecognizedLiabilitiesAssumedFinanceLeaseObligationsNonCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_DepositsAndCashAndCashEquivalentsMember" abstract="true" name="DepositsAndCashAndCashEquivalentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_CostOrAmortizedCostAbstract" abstract="true" name="CostOrAmortizedCostAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_ContingentConsiderationLiabilityNoncurrentFairValueDisclosure" abstract="false" name="ContingentConsiderationLiabilityNoncurrentFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ContingentConsiderationMember" abstract="true" name="ContingentConsiderationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_RightOfUseAssets" abstract="false" name="RightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_LeaseLiabilities" abstract="false" name="LeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_WeightedAverageRemainingLeaseTermYearsAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermYearsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_WeightedAverageDiscountRateInPercentAbstract" abstract="true" name="WeightedAverageDiscountRateInPercentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_FinanceLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="FinanceLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_TreasurySharesReconciliationRollForward" abstract="true" name="TreasurySharesReconciliationRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_IncomeTaxDisclosureTable" abstract="true" name="IncomeTaxDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gct_IncomeTaxDisclosureLineItems" abstract="true" name="IncomeTaxDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_NetIncomePerOrdinaryShareAttributableToOrdinaryShareholdersBasicAndDilutedAbstract" abstract="true" name="NetIncomePerOrdinaryShareAttributableToOrdinaryShareholdersBasicAndDilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gct_ProductSalesToBMember" abstract="true" name="ProductSalesToBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_ProductSalesToCMember" abstract="true" name="ProductSalesToCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_OffPlatformMember" abstract="true" name="OffPlatformMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_Gigacloud1pMember" abstract="true" name="Gigacloud1pMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gct_ContractWithCustomerLiabilityAdditionalLiabilityRecognized" abstract="false" name="ContractWithCustomerLiabilityAdditionalLiabilityRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ContractWithCustomerLiabilityRevenueRecognizedFromCashReceivedDuringTheYear" abstract="false" name="ContractWithCustomerLiabilityRevenueRecognizedFromCashReceivedDuringTheYear" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_ContractWithCustomerLiabilityforeignExchangeEffect" abstract="false" name="ContractWithCustomerLiabilityforeignExchangeEffect" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gct_StockRepurchaseCost" abstract="false" name="StockRepurchaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
