<?xml version="1.0" encoding="utf-8"?>
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <!-- INTEGIX by Ez-XBRL -->
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#DocumentAndEntityInformation" roleURI="http://www.greenpowerbus.com/role/DocumentAndEntityInformation"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#ConsolidatedStatementsOfChangesInEquityDeficit" roleURI="http://www.greenpowerbus.com/role/ConsolidatedStatementsOfChangesInEquityDeficit"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SignificantAccountingPoliciesNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SignificantAccountingPoliciesDetails1" roleURI="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesDetails1"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SignificantAccountingPoliciesScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentDetails" roleURI="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#AccountsReceivableNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/AccountsReceivableNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#FinanceLeaseReceivablesScheduleOfPaymentsToReceivedOnFinanceLeaseReceivablesDetails" roleURI="http://www.greenpowerbus.com/role/FinanceLeaseReceivablesScheduleOfPaymentsToReceivedOnFinanceLeaseReceivablesDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#RightOfUseAssetsAndLeaseLiabilitiesNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/RightOfUseAssetsAndLeaseLiabilitiesNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#RightOfUseAssetsAndLeaseLiabilitiesScheduleOfPaymentsOnLeaseLiabilitiesDetails" roleURI="http://www.greenpowerbus.com/role/RightOfUseAssetsAndLeaseLiabilitiesScheduleOfPaymentsOnLeaseLiabilitiesDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#RestrictedDepositNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/RestrictedDepositNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#PropertyAndEquipmentNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/PropertyAndEquipmentNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#PropertyAndEquipmentScheduleOfPropertyAndEquipmentActivitiesDetails" roleURI="http://www.greenpowerbus.com/role/PropertyAndEquipmentScheduleOfPropertyAndEquipmentActivitiesDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#LineOfCreditNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/LineOfCreditNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#TermLoanFacilityNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/TermLoanFacilityNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#TermLoanFacilitysNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/TermLoanFacilitysNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#ConvertibleDebenturesNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/ConvertibleDebenturesNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#WarrantsNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/WarrantsNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#WarrantsDetails" roleURI="http://www.greenpowerbus.com/role/WarrantsDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#WarrantsDetails1" roleURI="http://www.greenpowerbus.com/role/WarrantsDetails1"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#ShareCapitalNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/ShareCapitalNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#StockOptionsNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/StockOptionsNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#StockOptionsScheduleOfScheduleOfIncentiveStockOptionsGrantedUnderPlanDetails" roleURI="http://www.greenpowerbus.com/role/StockOptionsScheduleOfScheduleOfIncentiveStockOptionsGrantedUnderPlanDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#StockOptionsScheduleOfWeightedAverageAssumptionsUsedForValuationOfStockOptionGrantsDetails" roleURI="http://www.greenpowerbus.com/role/StockOptionsScheduleOfWeightedAverageAssumptionsUsedForValuationOfStockOptionGrantsDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#DeferredRevenueNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/DeferredRevenueNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#FinancialInstrumentsNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/FinancialInstrumentsNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#FinancialInstrumentsScheduleOfFinancialCommitmentsByMaturityDetails" roleURI="http://www.greenpowerbus.com/role/FinancialInstrumentsScheduleOfFinancialCommitmentsByMaturityDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#FinancialInstrumentsScheduleOfExposedToCurrencyRiskThroughFinancialAssetsAndLiabilitiesDetails" roleURI="http://www.greenpowerbus.com/role/FinancialInstrumentsScheduleOfExposedToCurrencyRiskThroughFinancialAssetsAndLiabilitiesDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#CapitalManagementNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/CapitalManagementNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#RelatedPartyTransactionsNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/RelatedPartyTransactionsNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#IncomeTaxesNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/IncomeTaxesNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#IncomeTaxesScheduleOfNatureAndEffectOfTheTemporaryDifferencesGivingRiseToTheDeferredIncomeTaxAssetsDetails" roleURI="http://www.greenpowerbus.com/role/IncomeTaxesScheduleOfNatureAndEffectOfTheTemporaryDifferencesGivingRiseToTheDeferredIncomeTaxAssetsDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SegmentedInformationAndOtherAdditionalDisclosuresNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfRevenuesAllocatedByGeographyDetails" roleURI="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfRevenuesAllocatedByGeographyDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SegmentedInformationDisclosureOfPropertyAndEquipmentAllocatedByGeographyDetails" roleURI="http://www.greenpowerbus.com/role/SegmentedInformationDisclosureOfPropertyAndEquipmentAllocatedByGeographyDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfCostsAllocatedToExpenseCategoriesAndToCostOfSalesDetails" roleURI="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfCostsAllocatedToExpenseCategoriesAndToCostOfSalesDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#AcquisitionOfLionTruckBodyNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/AcquisitionOfLionTruckBodyNarrativeDetails"/>
  <roleRef xlink:type="simple" xlink:href="gpvrf-20260331.xsd#EventsAfterTheReportingPeriodNarrativeDetails" roleURI="http://www.greenpowerbus.com/role/EventsAfterTheReportingPeriodNarrativeDetails"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll"/>
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/DocumentAndEntityInformation">
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesAddressTypeAxis" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain" xlink:label="loc_dei_AddressTypeDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_BusinessContactMember" xlink:label="loc_dei_BusinessContactMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain" xlink:label="loc_dei_AddressTypeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BdoCanadaLlpMember" xlink:label="loc_gpvrf_BdoCanadaLlpMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CroweMackayLlpMember" xlink:label="loc_gpvrf_CroweMackayLlpMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentDescription" xlink:label="loc_dei_AmendmentDescription_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_15"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_16"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_19"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentRegistrationStatement" xlink:label="loc_dei_DocumentRegistrationStatement_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport" xlink:label="loc_dei_DocumentAnnualReport_21"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="loc_dei_DocumentTransitionReport_22"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentShellCompanyReport" xlink:label="loc_dei_DocumentShellCompanyReport_23"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_24"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_25"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_26"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_27"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_28"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="loc_dei_EntityInteractiveDataCurrent_29"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_30"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="loc_dei_EntityExTransitionPeriod_31"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_32"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_33"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_34"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_35"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_36"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="loc_dei_IcfrAuditorAttestationFlag_37"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_38"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="loc_dei_EntityShellCompany_39"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelName" xlink:label="loc_dei_ContactPersonnelName_40"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_41"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="loc_dei_EntityAddressAddressLine2_42"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_43"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_44"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_45"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCountry" xlink:label="loc_dei_EntityAddressCountry_46"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_47"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_48"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelFaxNumber" xlink:label="loc_dei_ContactPersonnelFaxNumber_49"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAccountingStandard" xlink:label="loc_dei_DocumentAccountingStandard_50"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelEmailAddress" xlink:label="loc_dei_ContactPersonnelEmailAddress_51"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="loc_dei_AuditorName_52"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="loc_dei_AuditorLocation_53"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="loc_dei_AuditorFirmId_54"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorOpinionTextBlock" xlink:label="loc_dei_AuditorOpinionTextBlock_55"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentInformationTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_1" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_1" xlink:to="loc_dei_AddressTypeDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_1" xlink:to="loc_dei_BusinessContactMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_1" xlink:to="loc_dei_AddressTypeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_1" xlink:to="loc_dei_LegalEntityAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5" xlink:to="loc_dei_EntityDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5" xlink:to="loc_gpvrf_BdoCanadaLlpMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5" xlink:to="loc_gpvrf_CroweMackayLlpMember_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5" xlink:to="loc_dei_EntityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityRegistrantName_11" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityCentralIndexKey_12" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AmendmentFlag_13" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AmendmentDescription_14" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_CurrentFiscalYearEndDate_15" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentType_16" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentPeriodEndDate_17" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentFiscalYearFocus_18" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentFiscalPeriodFocus_19" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentRegistrationStatement_20" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentAnnualReport_21" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentTransitionReport_22" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentShellCompanyReport_23" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityFileNumber_24" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityIncorporationStateCountryCode_25" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_26" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_27" order="170" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityCurrentReportingStatus_28" order="180" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityInteractiveDataCurrent_29" order="190" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityEmergingGrowthCompany_30" order="200" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityExTransitionPeriod_31" order="210" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityVoluntaryFilers_32" order="220" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityFilerCategory_33" order="230" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_Security12bTitle_34" order="240" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_TradingSymbol_35" order="250" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_SecurityExchangeName_36" order="260" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_IcfrAuditorAttestationFlag_37" order="270" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_38" order="280" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityShellCompany_39" order="290" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_ContactPersonnelName_40" order="300" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressAddressLine1_41" order="310" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressAddressLine2_42" order="320" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressStateOrProvince_43" order="330" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressPostalZipCode_44" order="340" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressCityOrTown_45" order="350" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_EntityAddressCountry_46" order="360" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_CityAreaCode_47" order="370" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_LocalPhoneNumber_48" order="380" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_ContactPersonnelFaxNumber_49" order="390" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_DocumentAccountingStandard_50" order="400" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_ContactPersonnelEmailAddress_51" order="410" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AuditorName_52" order="420" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AuditorLocation_53" order="430" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AuditorFirmId_54" order="440" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_0" xlink:to="loc_dei_AuditorOpinionTextBlock_55" order="450" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/ConsolidatedStatementsOfChangesInEquityDeficit">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="loc_ifrs-full_IssuedCapitalMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PreferenceSharesMember" xlink:label="loc_ifrs-full_PreferenceSharesMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherEquityInterestMember" xlink:label="loc_ifrs-full_OtherEquityInterestMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember" xlink:label="loc_ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember_4"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarningsMember" xlink:label="loc_ifrs-full_RetainedEarningsMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-full_Equity_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesOutstanding" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SharesValueIssuedForCash" xlink:label="loc_gpvrf_SharesValueIssuedForCash_13"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SharesIssuedForCash" xlink:label="loc_gpvrf_SharesIssuedForCash_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughUnitTransaction" xlink:label="loc_gpvrf_IncreaseDecreaseThroughUnitTransaction_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesIssuedInUnitTransaction" xlink:label="loc_gpvrf_IssuanceOfSharesIssuedInUnitTransaction_16"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShareIssueRelatedCost" xlink:label="loc_ifrs-full_ShareIssueRelatedCost_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughExerciseOfOptions_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughFairValueOfStockOptionsExercised" xlink:label="loc_gpvrf_IssuanceOfSharesThroughFairValueOfStockOptionsExercised_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughWarrantsIssuedInUnitTransaction" xlink:label="loc_gpvrf_IncreaseDecreaseThroughWarrantsIssuedInUnitTransaction_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughWarrantIssuanceCosts" xlink:label="loc_gpvrf_IncreaseDecreaseThroughWarrantIssuanceCosts_21"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughFairValueOfStockOptionsForfeited" xlink:label="loc_gpvrf_IncreaseDecreaseThroughFairValueOfStockOptionsForfeited_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughBonusSharesIssuedToRelatedParties" xlink:label="loc_gpvrf_IncreaseDecreaseThroughBonusSharesIssuedToRelatedParties_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughBonusSharesIssuedToRelatedParties" xlink:label="loc_gpvrf_IssuanceOfSharesThroughBonusSharesIssuedToRelatedParties_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughPreferredSharesConvertedToCommonShares" xlink:label="loc_gpvrf_IncreaseDecreaseThroughPreferredSharesConvertedToCommonShares_25"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughPreferredSharesConvertedToCommonShares" xlink:label="loc_gpvrf_IssuanceOfSharesThroughPreferredSharesConvertedToCommonShares_26"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughRelatedPartyLoansConvertedIntoPrefBShares" xlink:label="loc_gpvrf_IncreaseDecreaseThroughRelatedPartyLoansConvertedIntoPrefBShares_27"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughRelatedPartyLoansConvertedIntoPrefBShares" xlink:label="loc_gpvrf_IssuanceOfSharesThroughRelatedPartyLoansConvertedIntoPrefBShares_28"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DividendsPaid" xlink:label="loc_ifrs-full_DividendsPaid_29"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughEquityPortionOfDebenturesIssued" xlink:label="loc_gpvrf_IncreaseDecreaseThroughEquityPortionOfDebenturesIssued_30"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughWarrantsIssued" xlink:label="loc_gpvrf_IncreaseDecreaseThroughWarrantsIssued_31"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughInvestmentWriteDownInLionTruckBodyInc" xlink:label="loc_gpvrf_IncreaseDecreaseThroughInvestmentWriteDownInLionTruckBodyInc_32"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_33"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ReserveOfExchangesDifferencesOnTranslation" xlink:label="loc_gpvrf_ReserveOfExchangesDifferencesOnTranslation_34"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="loc_ifrs-full_ProfitLoss_35"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares" xlink:label="loc_gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares_36"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_StatementOfChangesInEquityTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_1" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_1" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_IssuedCapitalMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_PreferenceSharesMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_OtherEquityInterestMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_1" xlink:to="loc_ifrs-full_RetainedEarningsMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_1" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_Equity_11" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_NumberOfSharesOutstanding_12" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_SharesValueIssuedForCash_13" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_SharesIssuedForCash_14" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughUnitTransaction_15" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesIssuedInUnitTransaction_16" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_ShareIssueRelatedCost_17" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughExerciseOfOptions_18" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughFairValueOfStockOptionsExercised_19" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughWarrantsIssuedInUnitTransaction_20" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughWarrantIssuanceCosts_21" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughFairValueOfStockOptionsForfeited_22" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughBonusSharesIssuedToRelatedParties_23" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughBonusSharesIssuedToRelatedParties_24" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughPreferredSharesConvertedToCommonShares_25" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughPreferredSharesConvertedToCommonShares_26" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughRelatedPartyLoansConvertedIntoPrefBShares_27" order="170" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughRelatedPartyLoansConvertedIntoPrefBShares_28" order="180" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_DividendsPaid_29" order="190" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughEquityPortionOfDebenturesIssued_30" order="200" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughWarrantsIssued_31" order="210" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughInvestmentWriteDownInLionTruckBodyInc_32" order="220" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_33" order="230" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_ReserveOfExchangesDifferencesOnTranslation_34" order="240" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_ifrs-full_ProfitLoss_35" order="250" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_0" xlink:to="loc_gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares_36" order="260" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SignificantAccountingPoliciesLineItems" xlink:label="loc_gpvrf_SignificantAccountingPoliciesLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SignificantAccountingPoliciesTable" xlink:label="loc_gpvrf_SignificantAccountingPoliciesTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="loc_ifrs-full_BottomOfRangeMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermOfWarranty" xlink:label="loc_gpvrf_TermOfWarranty_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Goodwill" xlink:label="loc_ifrs-full_Goodwill_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WritedownOfAssetsDueToGoodwill" xlink:label="loc_gpvrf_WritedownOfAssetsDueToGoodwill_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ImpairmentOnFinanceLeaseReceivables" xlink:label="loc_gpvrf_ImpairmentOnFinanceLeaseReceivables_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ContractPayment" xlink:label="loc_gpvrf_ContractPayment_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_gpvrf_SignificantAccountingPoliciesTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_SignificantAccountingPoliciesTable_1" xlink:to="loc_ifrs-full_RangeAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_1" xlink:to="loc_ifrs-full_RangeDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_1" xlink:to="loc_ifrs-full_BottomOfRangeMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_1" xlink:to="loc_ifrs-full_TopOfRangeMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_1" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_gpvrf_TermOfWarranty_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_ifrs-full_Goodwill_8" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_gpvrf_WritedownOfAssetsDueToGoodwill_9" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_gpvrf_ImpairmentOnFinanceLeaseReceivables_10" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_SignificantAccountingPoliciesLineItems_0" xlink:to="loc_gpvrf_ContractPayment_11" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesDetails1">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GPGreenPowerIndustriesIncMember" xlink:label="loc_gpvrf_GPGreenPowerIndustriesIncMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GreenPowerMotorCompanyIncMember" xlink:label="loc_gpvrf_GreenPowerMotorCompanyIncMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BCLtdMember" xlink:label="loc_gpvrf_BCLtdMember_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SanJoaquinValleyEquipmentLeasingIncMember" xlink:label="loc_gpvrf_SanJoaquinValleyEquipmentLeasingIncMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BCLtdOneMember" xlink:label="loc_gpvrf_BCLtdOneMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ElectricVehicleLogisticsIncMember" xlink:label="loc_gpvrf_ElectricVehicleLogisticsIncMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GreenPowerManufacturingWvIncMember" xlink:label="loc_gpvrf_GreenPowerManufacturingWvIncMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GpTruckBodyIncMember" xlink:label="loc_gpvrf_GpTruckBodyIncMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LionTruckBodyIncorporatedMember" xlink:label="loc_gpvrf_LionTruckBodyIncorporatedMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GeruiNewEnergyVehicleCoLtdMember" xlink:label="loc_gpvrf_GeruiNewEnergyVehicleCoLtdMember_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EaGreenPowerPrivateLtdMember" xlink:label="loc_gpvrf_EaGreenPowerPrivateLtdMember_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CountryOfIncorporationOrResidenceOfSubsidiary" xlink:label="loc_ifrs-full_CountryOfIncorporationOrResidenceOfSubsidiary_16"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PrincipalActivityOfEntity" xlink:label="loc_gpvrf_PrincipalActivityOfEntity_18"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_1" xlink:to="loc_dei_LegalEntityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_GPGreenPowerIndustriesIncMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_GreenPowerMotorCompanyIncMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_BCLtdMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_SanJoaquinValleyEquipmentLeasingIncMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_BCLtdOneMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_ElectricVehicleLogisticsIncMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_GreenPowerManufacturingWvIncMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_GpTruckBodyIncMember_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_LionTruckBodyIncorporatedMember_9" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_GeruiNewEnergyVehicleCoLtdMember_10" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_EaGreenPowerPrivateLtdMember_11" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_0" xlink:to="loc_ifrs-full_CountryOfIncorporationOrResidenceOfSubsidiary_16" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_0" xlink:to="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_17" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_0" xlink:to="loc_gpvrf_PrincipalActivityOfEntity_18" order="30" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SignificantAccountingPoliciesScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerEquipmentMember" xlink:label="loc_ifrs-full_ComputerEquipmentMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FurnitureMember" xlink:label="loc_gpvrf_FurnitureMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AutomobileMember" xlink:label="loc_gpvrf_AutomobileMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_VehiclesMember" xlink:label="loc_ifrs-full_VehiclesMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ToolsAndEquipmentMember" xlink:label="loc_gpvrf_ToolsAndEquipmentMember_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseholdImprovementsMember" xlink:label="loc_ifrs-full_LeaseholdImprovementsMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfUsefulLifePropertyPlantAndEquipment" xlink:label="loc_ifrs-full_DescriptionOfUsefulLifePropertyPlantAndEquipment_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_ComputerEquipmentMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_FurnitureMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_AutomobileMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_VehiclesMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_ToolsAndEquipmentMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_LeaseholdImprovementsMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DescriptionOfUsefulLifePropertyPlantAndEquipment_11" order="10" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/AccountsReceivableNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMajorCustomersLineItems" xlink:label="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMajorCustomersTable" xlink:label="loc_ifrs-full_DisclosureOfMajorCustomersTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OneCustomerMember" xlink:label="loc_gpvrf_OneCustomerMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TwoCustomersMember" xlink:label="loc_gpvrf_TwoCustomersMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ThreeCustomersMember" xlink:label="loc_gpvrf_ThreeCustomersMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AllowanceAccountForCreditLosseOfFinancialAssets" xlink:label="loc_gpvrf_AllowanceAccountForCreditLosseOfFinancialAssets_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable" xlink:label="loc_gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets" xlink:label="loc_gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PercentageOfAccountsReceivable" xlink:label="loc_gpvrf_PercentageOfAccountsReceivable_12"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfMajorCustomersTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersTable_1" xlink:to="loc_srt_MajorCustomersAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_1" xlink:to="loc_srt_NameOfMajorCustomerDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_1" xlink:to="loc_gpvrf_OneCustomerMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_1" xlink:to="loc_gpvrf_TwoCustomersMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_1" xlink:to="loc_gpvrf_ThreeCustomersMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_1" xlink:to="loc_srt_NameOfMajorCustomerDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_AllowanceAccountForCreditLosseOfFinancialAssets_8" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable_9" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets_10" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_11" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_PercentageOfAccountsReceivable_12" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/FinanceLeaseReceivablesScheduleOfPaymentsToReceivedOnFinanceLeaseReceivablesDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableTable" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="loc_ifrs-full_MaturityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_4"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsAndNotLaterThanSevenYearsMember" xlink:label="loc_ifrs-full_LaterThanFiveYearsAndNotLaterThanSevenYearsMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RemainderYearMember" xlink:label="loc_gpvrf_RemainderYearMember_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UndiscountedFinanceLeasePaymentsToBeReceived" xlink:label="loc_ifrs-full_UndiscountedFinanceLeasePaymentsToBeReceived_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable" xlink:label="loc_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceLeaseReceivables" xlink:label="loc_ifrs-full_FinanceLeaseReceivables_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentFinanceLeaseReceivables" xlink:label="loc_ifrs-full_CurrentFinanceLeaseReceivables_15"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:label="loc_ifrs-full_NoncurrentFinanceLeaseReceivables_16"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableTable_1" xlink:to="loc_ifrs-full_MaturityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanFiveYearsAndNotLaterThanSevenYearsMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_gpvrf_RemainderYearMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_UndiscountedFinanceLeasePaymentsToBeReceived_12" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable_13" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_FinanceLeaseReceivables_14" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_CurrentFinanceLeaseReceivables_15" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableLineItems_0" xlink:to="loc_ifrs-full_NoncurrentFinanceLeaseReceivables_16" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/RightOfUseAssetsAndLeaseLiabilitiesNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems" xlink:label="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable" xlink:label="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SouthCharlestonDevelopmentAuthorityMember" xlink:label="loc_gpvrf_SouthCharlestonDevelopmentAuthorityMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EventsAfterReportingPeriodMember" xlink:label="loc_gpvrf_EventsAfterReportingPeriodMember_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeaseAgreementAxis" xlink:label="loc_gpvrf_LeaseAgreementAxis_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeaseAgreementDomain" xlink:label="loc_gpvrf_LeaseAgreementDomain_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PropertyInRiversideMember" xlink:label="loc_gpvrf_PropertyInRiversideMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeaseAgreementDomain" xlink:label="loc_gpvrf_LeaseAgreementDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="loc_ifrs-full_BottomOfRangeMember_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16" xlink:label="loc_ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16_19"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:label="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRightofuseAssets" xlink:label="loc_ifrs-full_DepreciationRightofuseAssets_21"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RentalExpense" xlink:label="loc_ifrs-full_RentalExpense_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PaymentsForShortTermLeases" xlink:label="loc_gpvrf_PaymentsForShortTermLeases_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RemainingPaymentsOnShortTermLeases" xlink:label="loc_gpvrf_RemainingPaymentsOnShortTermLeases_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AnnualLeasePayments" xlink:label="loc_gpvrf_AnnualLeasePayments_25"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ForgivenessOnLeaseLiability" xlink:label="loc_gpvrf_ForgivenessOnLeaseLiability_26"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LesseeIncrementalBorrowingRate" xlink:label="loc_gpvrf_LesseeIncrementalBorrowingRate_27"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RightOfUseAssetAdditions" xlink:label="loc_gpvrf_RightOfUseAssetAdditions_28"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfEmployeesThereafterForEligibleForgiveness" xlink:label="loc_gpvrf_NumberOfEmployeesThereafterForEligibleForgiveness_29"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_MonthlyLeasePayments" xlink:label="loc_gpvrf_MonthlyLeasePayments_30"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeasePaymentReductionAgreed" xlink:label="loc_gpvrf_LeasePaymentReductionAgreed_31"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeasePaymentSuspensionAmount" xlink:label="loc_gpvrf_LeasePaymentSuspensionAmount_32"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeasePaymentReductionDeferred" xlink:label="loc_gpvrf_LeasePaymentReductionDeferred_33"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_GovernmentGrantRelatedLeaseAdjustment" xlink:label="loc_gpvrf_GovernmentGrantRelatedLeaseAdjustment_34"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AdditionalForgivenessOnLeaseLiability" xlink:label="loc_gpvrf_AdditionalForgivenessOnLeaseLiability_35"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfEmployeesThereafterEligibleForAdditionalForgiveness" xlink:label="loc_gpvrf_NumberOfEmployeesThereafterEligibleForAdditionalForgiveness_36"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TotalAmountOfForgivenessOnLeaseLiability" xlink:label="loc_gpvrf_TotalAmountOfForgivenessOnLeaseLiability_37"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1" xlink:to="loc_dei_LegalEntityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_SouthCharlestonDevelopmentAuthorityMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5" xlink:to="loc_gpvrf_EventsAfterReportingPeriodMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1" xlink:to="loc_gpvrf_LeaseAgreementAxis_9" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_LeaseAgreementAxis_9" xlink:to="loc_gpvrf_LeaseAgreementDomain_9" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_LeaseAgreementDomain_9" xlink:to="loc_gpvrf_PropertyInRiversideMember_9" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_LeaseAgreementAxis_9" xlink:to="loc_gpvrf_LeaseAgreementDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesTable_1" xlink:to="loc_ifrs-full_RangeAxis_13" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_13" xlink:to="loc_ifrs-full_RangeDomain_13" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_13" xlink:to="loc_ifrs-full_BottomOfRangeMember_13" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_13" xlink:to="loc_ifrs-full_TopOfRangeMember_14" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_13" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageLesseesIncrementalBorrowingRateAppliedToLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16_19" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_20" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_DepreciationRightofuseAssets_21" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_RentalExpense_22" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_PaymentsForShortTermLeases_23" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_RemainingPaymentsOnShortTermLeases_24" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_AnnualLeasePayments_25" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_ForgivenessOnLeaseLiability_26" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_LesseeIncrementalBorrowingRate_27" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_RightOfUseAssetAdditions_28" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_NumberOfEmployeesThereafterForEligibleForgiveness_29" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_MonthlyLeasePayments_30" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_LeasePaymentReductionAgreed_31" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_LeasePaymentSuspensionAmount_32" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_LeasePaymentReductionDeferred_33" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_GovernmentGrantRelatedLeaseAdjustment_34" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_AdditionalForgivenessOnLeaseLiability_35" order="170" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_NumberOfEmployeesThereafterEligibleForAdditionalForgiveness_36" order="180" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDetailedInformationAboutRightOfUseAssetsAndLeaseLiabilitiesLineItems_0" xlink:to="loc_gpvrf_TotalAmountOfForgivenessOnLeaseLiability_37" order="190" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/RightOfUseAssetsAndLeaseLiabilitiesScheduleOfPaymentsOnLeaseLiabilitiesDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="loc_ifrs-full_MaturityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearMember" xlink:label="loc_ifrs-full_LaterThanOneYearMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UndiscountedOperatingLeasePayments" xlink:label="loc_gpvrf_UndiscountedOperatingLeasePayments_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OperatingLeaseInterestExpense" xlink:label="loc_gpvrf_OperatingLeaseInterestExpense_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilities" xlink:label="loc_ifrs-full_LeaseLiabilities_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable_1" xlink:to="loc_ifrs-full_MaturityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanOneYearMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_gpvrf_UndiscountedOperatingLeasePayments_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_gpvrf_OperatingLeaseInterestExpense_8" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_ifrs-full_LeaseLiabilities_9" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_10" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_0" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_11" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/RestrictedDepositNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RestrictedDepositLineItems" xlink:label="loc_gpvrf_RestrictedDepositLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RestrictedDepositTable" xlink:label="loc_gpvrf_RestrictedDepositTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EventsAfterReportingPeriodMember" xlink:label="loc_gpvrf_EventsAfterReportingPeriodMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RestrictedDepositClassifiedAsInvestingActivities" xlink:label="loc_gpvrf_RestrictedDepositClassifiedAsInvestingActivities_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DescriptionOfTermsOfDeposits" xlink:label="loc_gpvrf_DescriptionOfTermsOfDeposits_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DepositsInterestRatePercentage" xlink:label="loc_gpvrf_DepositsInterestRatePercentage_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseInStandbyLetterOfCredit" xlink:label="loc_gpvrf_IncreaseInStandbyLetterOfCredit_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditReservedAsCollateral" xlink:label="loc_gpvrf_LineOfCreditReservedAsCollateral_10"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_RestrictedDepositTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_RestrictedDepositTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1" xlink:to="loc_gpvrf_EventsAfterReportingPeriodMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_RestrictedDepositClassifiedAsInvestingActivities_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_DescriptionOfTermsOfDeposits_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_DepositsInterestRatePercentage_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_IncreaseInStandbyLetterOfCredit_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RestrictedDepositLineItems_0" xlink:to="loc_gpvrf_LineOfCreditReservedAsCollateral_10" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/PropertyAndEquipmentNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CompanyInPortervilleCaliforniaMember" xlink:label="loc_gpvrf_CompanyInPortervilleCaliforniaMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LionTruckBodyIncorporatedMember" xlink:label="loc_gpvrf_LionTruckBodyIncorporatedMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VehiclesTransferredFromPropertyAndEquipmentToFinishedGoodsInventory" xlink:label="loc_gpvrf_VehiclesTransferredFromPropertyAndEquipmentToFinishedGoodsInventory_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VehiclesTransferredFromInventoryToPropertyAndEquipment" xlink:label="loc_gpvrf_VehiclesTransferredFromInventoryToPropertyAndEquipment_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:label="loc_ifrs-full_ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" xlink:to="loc_dei_LegalEntityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_CompanyInPortervilleCaliforniaMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1" xlink:to="loc_gpvrf_LionTruckBodyIncorporatedMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1" xlink:to="loc_dei_EntityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_gpvrf_VehiclesTransferredFromPropertyAndEquipmentToFinishedGoodsInventory_8" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_gpvrf_VehiclesTransferredFromInventoryToPropertyAndEquipment_9" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_10" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities_11" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/PropertyAndEquipmentScheduleOfPropertyAndEquipmentActivitiesDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerEquipmentMember" xlink:label="loc_ifrs-full_ComputerEquipmentMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FixturesAndFittingsMember" xlink:label="loc_ifrs-full_FixturesAndFittingsMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AutomobileMember" xlink:label="loc_gpvrf_AutomobileMember_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DemonstrationElectricVehiclesMember" xlink:label="loc_gpvrf_DemonstrationElectricVehiclesMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LeasedAssetMember" xlink:label="loc_gpvrf_LeasedAssetMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ToolsAndEquipmentMember" xlink:label="loc_gpvrf_ToolsAndEquipmentMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LandMember" xlink:label="loc_ifrs-full_LandMember_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseholdImprovementsMember" xlink:label="loc_ifrs-full_LeaseholdImprovementsMember_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="loc_ifrs-full_CarryingAmountMember_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="loc_ifrs-full_CarryingAmountMember_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseInventoriesInPropertyPlantAndEquipment" xlink:label="loc_gpvrf_IncreaseDecreaseInventoriesInPropertyPlantAndEquipment_19"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_DisposalsPropertyPlantAndEquipment_21"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_22"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AccumulatedDepreciationRemovedOnDisposal" xlink:label="loc_gpvrf_AccumulatedDepreciationRemovedOnDisposal_24"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_25"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_ComputerEquipmentMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_FixturesAndFittingsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_AutomobileMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_DemonstrationElectricVehiclesMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_LeasedAssetMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_ToolsAndEquipmentMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_LandMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_ifrs-full_LeaseholdImprovementsMember_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_1" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_12" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_12" xlink:to="loc_ifrs-full_CarryingAmountMember_12" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_12" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_12" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_12" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_13" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_12" xlink:to="loc_ifrs-full_CarryingAmountMember_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_18" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseInventoriesInPropertyPlantAndEquipment_19" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_20" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DisposalsPropertyPlantAndEquipment_21" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_22" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_23" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_gpvrf_AccumulatedDepreciationRemovedOnDisposal_24" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_25" order="80" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/LineOfCreditNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorOneMember" xlink:label="loc_gpvrf_DirectorOneMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorTwoMember" xlink:label="loc_gpvrf_DirectorTwoMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TwoDirectorsMember" xlink:label="loc_gpvrf_TwoDirectorsMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BmoBankOfMontrealMember" xlink:label="loc_gpvrf_BmoBankOfMontrealMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RevolvingDemandLineOfCreditFacilityMember" xlink:label="loc_gpvrf_RevolvingDemandLineOfCreditFacilityMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanMember" xlink:label="loc_gpvrf_TermLoanMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LenderMember" xlink:label="loc_gpvrf_LenderMember_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LenderOneMember" xlink:label="loc_gpvrf_LenderOneMember_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LenderTwoMember" xlink:label="loc_gpvrf_LenderTwoMember_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditMaximumLimit" xlink:label="loc_gpvrf_LineOfCreditMaximumLimit_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings" xlink:label="loc_ifrs-full_Borrowings_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRateBasis" xlink:label="loc_ifrs-full_BorrowingsInterestRateBasis_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditIncreasedMargin" xlink:label="loc_gpvrf_LineOfCreditIncreasedMargin_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfGuaranteesProvidedByDirectors" xlink:label="loc_gpvrf_ValueOfGuaranteesProvidedByDirectors_21"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_22"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FairValueOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan" xlink:label="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan_25"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfBonusSharesForEnteringLoan" xlink:label="loc_gpvrf_ValueOfBonusSharesForEnteringLoan_26"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughBonusSharesForProvidingLoanGuarantees" xlink:label="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForProvidingLoanGuarantees_27"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfBonusSharesAndWarrantsForProvidingLoanGuarantees" xlink:label="loc_gpvrf_ValueOfBonusSharesAndWarrantsForProvidingLoanGuarantees_28"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditBalance" xlink:label="loc_gpvrf_LineOfCreditBalance_29"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DescriptionOfCurrentRatioLimitUnderLineOfCredit" xlink:label="loc_gpvrf_DescriptionOfCurrentRatioLimitUnderLineOfCredit_30"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_DirectorOneMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_DirectorTwoMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_TwoDirectorsMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_7" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_7" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_BmoBankOfMontrealMember_7" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_RevolvingDemandLineOfCreditFacilityMember_8" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_TermLoanMember_9" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_LenderMember_10" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_LenderOneMember_11" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_7" xlink:to="loc_gpvrf_LenderTwoMember_12" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_7" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_LineOfCreditMaximumLimit_17" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_Borrowings_18" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRateBasis_19" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_LineOfCreditIncreasedMargin_20" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfGuaranteesProvidedByDirectors_21" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_22" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_23" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_24" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan_25" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfBonusSharesForEnteringLoan_26" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForProvidingLoanGuarantees_27" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfBonusSharesAndWarrantsForProvidingLoanGuarantees_28" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_LineOfCreditBalance_29" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_DescriptionOfCurrentRatioLimitUnderLineOfCredit_30" order="140" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/TermLoanFacilityNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RevolvingTermLoanFacilityLineItems" xlink:label="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RevolvingTermLoanFacilityTable" xlink:label="loc_gpvrf_RevolvingTermLoanFacilityTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExportDevelopmentCanadaMember" xlink:label="loc_gpvrf_ExportDevelopmentCanadaMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FirstFinancialCovenantsMember" xlink:label="loc_gpvrf_FirstFinancialCovenantsMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SecondFinancialCovenantsMember" xlink:label="loc_gpvrf_SecondFinancialCovenantsMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings" xlink:label="loc_ifrs-full_Borrowings_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRateBasis" xlink:label="loc_ifrs-full_BorrowingsInterestRateBasis_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DebtServiceCoverageRatioOfTermLoans" xlink:label="loc_gpvrf_DebtServiceCoverageRatioOfTermLoans_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CurrentRevolvingTermLoanFacility" xlink:label="loc_gpvrf_CurrentRevolvingTermLoanFacility_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0" xlink:to="loc_gpvrf_RevolvingTermLoanFacilityTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_1" xlink:to="loc_gpvrf_ExportDevelopmentCanadaMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_1" xlink:to="loc_gpvrf_FirstFinancialCovenantsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_1" xlink:to="loc_gpvrf_SecondFinancialCovenantsMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0" xlink:to="loc_ifrs-full_Borrowings_8" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRateBasis_9" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0" xlink:to="loc_gpvrf_DebtServiceCoverageRatioOfTermLoans_10" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_RevolvingTermLoanFacilityLineItems_0" xlink:to="loc_gpvrf_CurrentRevolvingTermLoanFacility_11" order="40" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/TermLoanFacilitysNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorOneMember" xlink:label="loc_gpvrf_DirectorOneMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorTwoMember" xlink:label="loc_gpvrf_DirectorTwoMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanFacilityMember" xlink:label="loc_gpvrf_TermLoanFacilityMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RevolvingDemandLineOfCreditFacilityMember" xlink:label="loc_gpvrf_RevolvingDemandLineOfCreditFacilityMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SecondFinancialCovenantsMember" xlink:label="loc_gpvrf_SecondFinancialCovenantsMember_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings" xlink:label="loc_ifrs-full_Borrowings_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="loc_ifrs-full_BorrowingsInterestRate_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_15"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsMaturity" xlink:label="loc_ifrs-full_BorrowingsMaturity_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FairValueOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfBonusSharesForProvidingLoanGuarantees" xlink:label="loc_gpvrf_ValueOfBonusSharesForProvidingLoanGuarantees_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DebtServiceCoverageRatioOfTermLoans" xlink:label="loc_gpvrf_DebtServiceCoverageRatioOfTermLoans_19"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermBorrowings" xlink:label="loc_ifrs-full_ShorttermBorrowings_20"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_DirectorOneMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_DirectorTwoMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_6" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_6" xlink:to="loc_gpvrf_TermLoanFacilityMember_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_6" xlink:to="loc_gpvrf_RevolvingDemandLineOfCreditFacilityMember_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_6" xlink:to="loc_gpvrf_SecondFinancialCovenantsMember_8" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_6" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_Borrowings_13" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRate_14" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_15" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsMaturity_16" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_17" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfBonusSharesForProvidingLoanGuarantees_18" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_DebtServiceCoverageRatioOfTermLoans_19" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_ShorttermBorrowings_20" order="80" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/ConvertibleDebenturesNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConvertibleDebenturesMember" xlink:label="loc_gpvrf_ConvertibleDebenturesMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CountrymanInvestmentsLtdMember" xlink:label="loc_gpvrf_CountrymanInvestmentsLtdMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FWPAcquisitionCorpMember" xlink:label="loc_gpvrf_FWPAcquisitionCorpMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_KokoFinancialServicesIncMember" xlink:label="loc_gpvrf_KokoFinancialServicesIncMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LenderOneMember" xlink:label="loc_gpvrf_LenderOneMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LenderTwoMember" xlink:label="loc_gpvrf_LenderTwoMember_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotesAndDebenturesIssued" xlink:label="loc_ifrs-full_NotesAndDebenturesIssued_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="loc_ifrs-full_BorrowingsInterestRate_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConvertibleDebtConversionPricePerShare" xlink:label="loc_gpvrf_ConvertibleDebtConversionPricePerShare_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoansClosed" xlink:label="loc_gpvrf_LoansClosed_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FairValueOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan" xlink:label="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan_21"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfBonusSharesForEnteringLoan" xlink:label="loc_gpvrf_ValueOfBonusSharesForEnteringLoan_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ValueOfCommonSharesAndWarrantsIssuedToLenders" xlink:label="loc_gpvrf_ValueOfCommonSharesAndWarrantsIssuedToLenders_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AccretionAndAccruedInterestOnConvertibleDebentures" xlink:label="loc_gpvrf_AccretionAndAccruedInterestOnConvertibleDebentures_24"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentPortionOfNoncurrentNotesAndDebenturesIssued" xlink:label="loc_ifrs-full_NoncurrentPortionOfNoncurrentNotesAndDebenturesIssued_25"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_1" xlink:to="loc_gpvrf_ConvertibleDebenturesMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_CountrymanInvestmentsLtdMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_FWPAcquisitionCorpMember_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_KokoFinancialServicesIncMember_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_LenderOneMember_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_LenderTwoMember_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_NotesAndDebenturesIssued_14" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRate_15" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ConvertibleDebtConversionPricePerShare_16" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_LoansClosed_17" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_18" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_19" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_FairValueOfSharePurchaseWarrantsGranted_20" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughBonusSharesForEnteringLoan_21" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfBonusSharesForEnteringLoan_22" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_ValueOfCommonSharesAndWarrantsIssuedToLenders_23" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_gpvrf_AccretionAndAccruedInterestOnConvertibleDebentures_24" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_0" xlink:to="loc_ifrs-full_NoncurrentPortionOfNoncurrentNotesAndDebenturesIssued_25" order="120" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/WarrantsNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsLineItems" xlink:label="loc_gpvrf_WarrantsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsTable" xlink:label="loc_gpvrf_WarrantsTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsOutstandingAxis" xlink:label="loc_gpvrf_WarrantsOutstandingAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsOutstandingDomain" xlink:label="loc_gpvrf_WarrantsOutstandingDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsOutstandingMember" xlink:label="loc_gpvrf_WarrantsOutstandingMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsOutstandingDomain" xlink:label="loc_gpvrf_WarrantsOutstandingDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FWPAcquisitionCorpMember" xlink:label="loc_gpvrf_FWPAcquisitionCorpMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CountrymanInvestmentsLtdMember" xlink:label="loc_gpvrf_CountrymanInvestmentsLtdMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="loc_ifrs-full_BottomOfRangeMember_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement" xlink:label="loc_gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsGrantedWeightedAverageExercisePrice" xlink:label="loc_gpvrf_WarrantsGrantedWeightedAverageExercisePrice_17"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_WarrantsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_gpvrf_WarrantsOutstandingAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_WarrantsOutstandingAxis_1" xlink:to="loc_gpvrf_WarrantsOutstandingDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsOutstandingDomain_1" xlink:to="loc_gpvrf_WarrantsOutstandingMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_WarrantsOutstandingAxis_1" xlink:to="loc_gpvrf_WarrantsOutstandingDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_5" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_5" xlink:to="loc_gpvrf_FWPAcquisitionCorpMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_5" xlink:to="loc_gpvrf_CountrymanInvestmentsLtdMember_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_5" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_ifrs-full_RangeAxis_10" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_10" xlink:to="loc_ifrs-full_RangeDomain_10" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_10" xlink:to="loc_ifrs-full_BottomOfRangeMember_10" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_10" xlink:to="loc_ifrs-full_TopOfRangeMember_11" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_10" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement_16" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_WarrantsGrantedWeightedAverageExercisePrice_17" order="20" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/WarrantsDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsLineItems" xlink:label="loc_gpvrf_WarrantsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsTable" xlink:label="loc_gpvrf_WarrantsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsOutstandingMember" xlink:label="loc_gpvrf_WarrantsOutstandingMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateAxis" xlink:label="loc_gpvrf_WarrantsIssueDateAxis_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateDomain" xlink:label="loc_gpvrf_WarrantsIssueDateDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateOneMember" xlink:label="loc_gpvrf_WarrantsIssueDateOneMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateTwoMember" xlink:label="loc_gpvrf_WarrantsIssueDateTwoMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateThreeMember" xlink:label="loc_gpvrf_WarrantsIssueDateThreeMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateFourMember" xlink:label="loc_gpvrf_WarrantsIssueDateFourMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateFiveMember" xlink:label="loc_gpvrf_WarrantsIssueDateFiveMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateSixMember" xlink:label="loc_gpvrf_WarrantsIssueDateSixMember_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateSevenMember" xlink:label="loc_gpvrf_WarrantsIssueDateSevenMember_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateEightMember" xlink:label="loc_gpvrf_WarrantsIssueDateEightMember_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateNineMember" xlink:label="loc_gpvrf_WarrantsIssueDateNineMember_13"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssueDateDomain" xlink:label="loc_gpvrf_WarrantsIssueDateDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExercisePriceOfOutstandingWarrants" xlink:label="loc_gpvrf_ExercisePriceOfOutstandingWarrants_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsOutstandingInSharebasedPaymentArrangement" xlink:label="loc_gpvrf_NumberOfWarrantsOutstandingInSharebasedPaymentArrangement_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement" xlink:label="loc_gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsExercisedInSharebasedPaymentArrangement" xlink:label="loc_gpvrf_NumberOfWarrantsExercisedInSharebasedPaymentArrangement_21"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsForfeitedOrExpiredInSharebasedPaymentArrangement" xlink:label="loc_gpvrf_NumberOfWarrantsForfeitedOrExpiredInSharebasedPaymentArrangement_22"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_WarrantsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" xlink:to="loc_gpvrf_WarrantsOutstandingMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_gpvrf_WarrantsIssueDateAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_WarrantsIssueDateAxis_5" xlink:to="loc_gpvrf_WarrantsIssueDateDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateOneMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateTwoMember_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateThreeMember_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateFourMember_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateFiveMember_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateSixMember_10" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateSevenMember_11" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateEightMember_12" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsIssueDateDomain_5" xlink:to="loc_gpvrf_WarrantsIssueDateNineMember_13" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_WarrantsIssueDateAxis_5" xlink:to="loc_gpvrf_WarrantsIssueDateDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_ExercisePriceOfOutstandingWarrants_18" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsOutstandingInSharebasedPaymentArrangement_19" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsGrantedInSharebasedPaymentArrangement_20" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsExercisedInSharebasedPaymentArrangement_21" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsForfeitedOrExpiredInSharebasedPaymentArrangement_22" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/WarrantsDetails1">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsLineItems" xlink:label="loc_gpvrf_WarrantsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsTable" xlink:label="loc_gpvrf_WarrantsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WarrantsMember" xlink:label="loc_ifrs-full_WarrantsMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WeightedAverageSharePriceWarrantsGranted" xlink:label="loc_gpvrf_WeightedAverageSharePriceWarrantsGranted_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExercisePriceWarrantsGranted" xlink:label="loc_gpvrf_ExercisePriceWarrantsGranted_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RiskFreeInterestRateWarrantsGranted" xlink:label="loc_gpvrf_RiskFreeInterestRateWarrantsGranted_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OptionLifeWarrantsGranted" xlink:label="loc_gpvrf_OptionLifeWarrantsGranted_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExpectedVolatilityWarrantsGranted" xlink:label="loc_gpvrf_ExpectedVolatilityWarrantsGranted_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExpectedForfeitureRateOfWarrantsGranted" xlink:label="loc_gpvrf_ExpectedForfeitureRateOfWarrantsGranted_11"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_WarrantsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_WarrantsTable_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" xlink:to="loc_ifrs-full_WarrantsMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_WeightedAverageSharePriceWarrantsGranted_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_ExercisePriceWarrantsGranted_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_RiskFreeInterestRateWarrantsGranted_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_OptionLifeWarrantsGranted_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_ExpectedVolatilityWarrantsGranted_10" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_WarrantsLineItems_0" xlink:to="loc_gpvrf_ExpectedForfeitureRateOfWarrantsGranted_11" order="60" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/ShareCapitalNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UnderwrittenOfferingMember" xlink:label="loc_gpvrf_UnderwrittenOfferingMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UnderwriterWarrantsMember" xlink:label="loc_gpvrf_UnderwriterWarrantsMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AtTheMarketOfferingMember" xlink:label="loc_gpvrf_AtTheMarketOfferingMember_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AtTheMarketOffering2025Member" xlink:label="loc_gpvrf_AtTheMarketOffering2025Member_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AtTheMarketOffering2022Member" xlink:label="loc_gpvrf_AtTheMarketOffering2022Member_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember" xlink:label="loc_ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesAConvertiblePreferredSharesMember" xlink:label="loc_gpvrf_SeriesAConvertiblePreferredSharesMember_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesBConvertiblePreferredSharesMember" xlink:label="loc_gpvrf_SeriesBConvertiblePreferredSharesMember_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="loc_ifrs-full_OrdinarySharesMember_19"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_23"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BeneficiallyOwnedByCEOAndDirectorMember" xlink:label="loc_gpvrf_BeneficiallyOwnedByCEOAndDirectorMember_23"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PreferredStockDividendRate" xlink:label="loc_gpvrf_PreferredStockDividendRate_28"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssued" xlink:label="loc_ifrs-full_NumberOfSharesIssued_29"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssueOfEquity" xlink:label="loc_ifrs-full_IssueOfEquity_30"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PreferredShareLiability" xlink:label="loc_gpvrf_PreferredShareLiability_31"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AccruedDividends" xlink:label="loc_gpvrf_AccruedDividends_32"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:label="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_33"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="loc_ifrs-full_ProceedsFromIssuingShares_34"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DiscountsAndOfferingExpenses" xlink:label="loc_gpvrf_DiscountsAndOfferingExpenses_35"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsIssuedToPurchaseCommonShares" xlink:label="loc_gpvrf_NumberOfWarrantsIssuedToPurchaseCommonShares_36"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_37"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PreferredStockConvertibleSharesIssued" xlink:label="loc_gpvrf_PreferredStockConvertibleSharesIssued_38"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfSharesConverted" xlink:label="loc_gpvrf_NumberOfSharesConverted_39"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="loc_ifrs-full_NotionalAmount_40"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfUnitsSoldUnderPrivatePlacement" xlink:label="loc_gpvrf_NumberOfUnitsSoldUnderPrivatePlacement_41"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ProceedsFromPrivatePlacementOfUnits" xlink:label="loc_gpvrf_ProceedsFromPrivatePlacementOfUnits_42"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="loc_ifrs-full_ParValuePerShare_43"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DescriptionOfConversionOfEquity" xlink:label="loc_gpvrf_DescriptionOfConversionOfEquity_44"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LossesOnChangeInFairValueOfDerivatives" xlink:label="loc_ifrs-full_LossesOnChangeInFairValueOfDerivatives_45"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FairValueOfWarrantsIssued" xlink:label="loc_gpvrf_FairValueOfWarrantsIssued_46"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ProfessionalFeesExpenseRelatedToWarrants" xlink:label="loc_gpvrf_ProfessionalFeesExpenseRelatedToWarrants_47"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsExercised" xlink:label="loc_gpvrf_NumberOfWarrantsExercised_48"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesIssuedForConversionOfDebentures" xlink:label="loc_gpvrf_IssuanceOfSharesIssuedForConversionOfDebentures_49"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfInitialPublicOffer" xlink:label="loc_gpvrf_IssuanceOfInitialPublicOffer_50"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfOtherEquityInstrument" xlink:label="loc_gpvrf_IssuanceOfOtherEquityInstrument_51"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares" xlink:label="loc_gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares_52"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PricePerUnit" xlink:label="loc_gpvrf_PricePerUnit_53"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IssuanceOfSharesThroughPrivatePlacementOfUnits" xlink:label="loc_gpvrf_IssuanceOfSharesThroughPrivatePlacementOfUnits_54"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DescriptionWarrantsUnderOffering" xlink:label="loc_gpvrf_DescriptionWarrantsUnderOffering_55"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ShareIssueCostRelatedToProspectusOfferingAndAtm" xlink:label="loc_gpvrf_ShareIssueCostRelatedToProspectusOfferingAndAtm_56"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsIssuedWeightedAverageExercisePrice" xlink:label="loc_gpvrf_WarrantsIssuedWeightedAverageExercisePrice_57"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsExpirationTerm" xlink:label="loc_gpvrf_WarrantsExpirationTerm_58"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_1" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" xlink:to="loc_gpvrf_UnderwrittenOfferingMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" xlink:to="loc_gpvrf_UnderwriterWarrantsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" xlink:to="loc_gpvrf_AtTheMarketOfferingMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" xlink:to="loc_gpvrf_AtTheMarketOffering2025Member_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_1" xlink:to="loc_gpvrf_AtTheMarketOffering2022Member_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_1" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" xlink:to="loc_srt_RangeAxis_9" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_9" xlink:to="loc_ifrs-full_RangeDomain_9" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_9" xlink:to="loc_ifrs-full_TopOfRangeMember_9" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_9" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_13" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_13" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_13" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_13" xlink:to="loc_ifrs-full_ReserveOfEquityComponentOfConvertibleInstrumentsMember_13" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_13" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_17" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_17" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_17" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_17" xlink:to="loc_gpvrf_SeriesAConvertiblePreferredSharesMember_17" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_17" xlink:to="loc_gpvrf_SeriesBConvertiblePreferredSharesMember_18" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_17" xlink:to="loc_ifrs-full_OrdinarySharesMember_19" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_17" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_23" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_23" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_23" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_23" xlink:to="loc_gpvrf_BeneficiallyOwnedByCEOAndDirectorMember_23" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_23" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_PreferredStockDividendRate_28" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_NumberOfSharesIssued_29" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_IssueOfEquity_30" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_PreferredShareLiability_31" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_AccruedDividends_32" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_33" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_ProceedsFromIssuingShares_34" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_DiscountsAndOfferingExpenses_35" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsIssuedToPurchaseCommonShares_36" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_37" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_PreferredStockConvertibleSharesIssued_38" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_NumberOfSharesConverted_39" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_NotionalAmount_40" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_NumberOfUnitsSoldUnderPrivatePlacement_41" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_ProceedsFromPrivatePlacementOfUnits_42" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_ParValuePerShare_43" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_DescriptionOfConversionOfEquity_44" order="170" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_ifrs-full_LossesOnChangeInFairValueOfDerivatives_45" order="180" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_FairValueOfWarrantsIssued_46" order="190" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_ProfessionalFeesExpenseRelatedToWarrants_47" order="200" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsExercised_48" order="210" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesIssuedForConversionOfDebentures_49" order="220" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_IssuanceOfInitialPublicOffer_50" order="230" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_IssuanceOfOtherEquityInstrument_51" order="240" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_NetFractionalSharesAsResultOfShareConsolidationShares_52" order="250" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_PricePerUnit_53" order="260" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_IssuanceOfSharesThroughPrivatePlacementOfUnits_54" order="270" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_DescriptionWarrantsUnderOffering_55" order="280" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_ShareIssueCostRelatedToProspectusOfferingAndAtm_56" order="290" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_WarrantsIssuedWeightedAverageExercisePrice_57" order="300" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0" xlink:to="loc_gpvrf_WarrantsExpirationTerm_58" order="310" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/StockOptionsNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TitleOfIndividualsAxis" xlink:label="loc_gpvrf_TitleOfIndividualsAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TitleOfIndividualsDomain" xlink:label="loc_gpvrf_TitleOfIndividualsDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorsAndOfficersMember" xlink:label="loc_gpvrf_DirectorsAndOfficersMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorsAndOfficersOneMember" xlink:label="loc_gpvrf_DirectorsAndOfficersOneMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EmployeesMember" xlink:label="loc_gpvrf_EmployeesMember_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EmployeesTwoMember" xlink:label="loc_gpvrf_EmployeesTwoMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConsultantMember" xlink:label="loc_gpvrf_ConsultantMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConsultantIRProviderMember" xlink:label="loc_gpvrf_ConsultantIRProviderMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DirectorsMember" xlink:label="loc_gpvrf_DirectorsMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ChiefFinancialOfficersMember" xlink:label="loc_gpvrf_ChiefFinancialOfficersMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AdvisorMember" xlink:label="loc_gpvrf_AdvisorMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EmployeesAndConsultantMember" xlink:label="loc_gpvrf_EmployeesAndConsultantMember_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TitleOfIndividualsDomain" xlink:label="loc_gpvrf_TitleOfIndividualsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsGrantDateAxis" xlink:label="loc_gpvrf_StockOptionsGrantDateAxis_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsGrantDateDomain" xlink:label="loc_gpvrf_StockOptionsGrantDateDomain_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionExpiryDateMarch272024Member" xlink:label="loc_gpvrf_StockOptionExpiryDateMarch272024Member_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateFebruary142023Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateFebruary142023Member_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateDecember102021Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateDecember102021Member_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateFebruary282028Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateFebruary282028Member_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionExpireDateMarch272024Member" xlink:label="loc_gpvrf_StockOptionExpireDateMarch272024Member_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsGrantDateDomain" xlink:label="loc_gpvrf_StockOptionsGrantDateDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VestingScheduleAxis" xlink:label="loc_gpvrf_VestingScheduleAxis_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VestingScheduleDomain" xlink:label="loc_gpvrf_VestingScheduleDomain_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After4MonthsMember" xlink:label="loc_gpvrf_After4MonthsMember_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After6Months9MonthsAnd12MonthsMember" xlink:label="loc_gpvrf_After6Months9MonthsAnd12MonthsMember_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After6MonthsMember" xlink:label="loc_gpvrf_After6MonthsMember_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After9MonthsMember" xlink:label="loc_gpvrf_After9MonthsMember_25"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After288DaysMember" xlink:label="loc_gpvrf_After288DaysMember_26"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_After12MonthsMember" xlink:label="loc_gpvrf_After12MonthsMember_27"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AfterYearOneTwoAndThreeMember" xlink:label="loc_gpvrf_AfterYearOneTwoAndThreeMember_28"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AfterYears2And3Member" xlink:label="loc_gpvrf_AfterYears2And3Member_29"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AfterYear2Member" xlink:label="loc_gpvrf_AfterYear2Member_30"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VestingScheduleDomain" xlink:label="loc_gpvrf_VestingScheduleDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_34"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_34"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EventsAfterReportingPeriodMember" xlink:label="loc_gpvrf_EventsAfterReportingPeriodMember_34"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_38"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TwoZeroTwoThreeEquityIncentivePlanMember" xlink:label="loc_gpvrf_TwoZeroTwoThreeEquityIncentivePlanMember_38"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TwoZeroTwoTwoEquityIncentivePlanMember" xlink:label="loc_gpvrf_TwoZeroTwoTwoEquityIncentivePlanMember_39"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RollingStockOptionPlanMember" xlink:label="loc_gpvrf_RollingStockOptionPlanMember_40"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FixedStockOptionPlanMember" xlink:label="loc_gpvrf_FixedStockOptionPlanMember_41"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_MaximumAggregateFairMarketValueOfStockOptionsExercisable" xlink:label="loc_gpvrf_MaximumAggregateFairMarketValueOfStockOptionsExercisable_46"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfCommonSharesAvailableForIssuanceInShareBasedArrangement" xlink:label="loc_gpvrf_NumberOfCommonSharesAvailableForIssuanceInShareBasedArrangement_47"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfStockOptionsAvailableForIssuanceInShareBasedArrangement" xlink:label="loc_gpvrf_NumberOfStockOptionsAvailableForIssuanceInShareBasedArrangement_48"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfPerformanceBasedAwardsAvailableForIssuanceInShareBasedArrangement" xlink:label="loc_gpvrf_NumberOfPerformanceBasedAwardsAvailableForIssuanceInShareBasedArrangement_49"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_50"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfMaximumTermOfOptionsGrantedForSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_DescriptionOfMaximumTermOfOptionsGrantedForSharebasedPaymentArrangement_51"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_52"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VestingPercentageOfStockOptions" xlink:label="loc_gpvrf_VestingPercentageOfStockOptions_53"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_54"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_55"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExpenseReversalOfShareBasedPaymentForfeitures" xlink:label="loc_gpvrf_ExpenseReversalOfShareBasedPaymentForfeitures_56"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_57"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_58"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_gpvrf_TitleOfIndividualsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_TitleOfIndividualsAxis_1" xlink:to="loc_gpvrf_TitleOfIndividualsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_DirectorsAndOfficersMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_DirectorsAndOfficersOneMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_EmployeesMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_EmployeesTwoMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_ConsultantMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_ConsultantIRProviderMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_DirectorsMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_ChiefFinancialOfficersMember_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_AdvisorMember_9" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_TitleOfIndividualsDomain_1" xlink:to="loc_gpvrf_EmployeesAndConsultantMember_10" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_TitleOfIndividualsAxis_1" xlink:to="loc_gpvrf_TitleOfIndividualsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_gpvrf_StockOptionsGrantDateAxis_14" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_StockOptionsGrantDateAxis_14" xlink:to="loc_gpvrf_StockOptionsGrantDateDomain_14" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsGrantDateDomain_14" xlink:to="loc_gpvrf_StockOptionExpiryDateMarch272024Member_14" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsGrantDateDomain_14" xlink:to="loc_gpvrf_StockOptionsExpiryDateFebruary142023Member_15" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsGrantDateDomain_14" xlink:to="loc_gpvrf_StockOptionsExpiryDateDecember102021Member_16" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsGrantDateDomain_14" xlink:to="loc_gpvrf_StockOptionsExpiryDateFebruary282028Member_17" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsGrantDateDomain_14" xlink:to="loc_gpvrf_StockOptionExpireDateMarch272024Member_18" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_StockOptionsGrantDateAxis_14" xlink:to="loc_gpvrf_StockOptionsGrantDateDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_gpvrf_VestingScheduleAxis_22" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_VestingScheduleAxis_22" xlink:to="loc_gpvrf_VestingScheduleDomain_22" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After4MonthsMember_22" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After6Months9MonthsAnd12MonthsMember_23" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After6MonthsMember_24" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After9MonthsMember_25" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After288DaysMember_26" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_After12MonthsMember_27" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_AfterYearOneTwoAndThreeMember_28" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_AfterYears2And3Member_29" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_VestingScheduleDomain_22" xlink:to="loc_gpvrf_AfterYear2Member_30" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_VestingScheduleAxis_22" xlink:to="loc_gpvrf_VestingScheduleDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_34" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_34" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_34" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_34" xlink:to="loc_gpvrf_EventsAfterReportingPeriodMember_34" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_34" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_38" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_38" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38" xlink:to="loc_gpvrf_TwoZeroTwoThreeEquityIncentivePlanMember_38" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38" xlink:to="loc_gpvrf_TwoZeroTwoTwoEquityIncentivePlanMember_39" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38" xlink:to="loc_gpvrf_RollingStockOptionPlanMember_40" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_38" xlink:to="loc_gpvrf_FixedStockOptionPlanMember_41" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_38" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_MaximumAggregateFairMarketValueOfStockOptionsExercisable_46" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_NumberOfCommonSharesAvailableForIssuanceInShareBasedArrangement_47" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_NumberOfStockOptionsAvailableForIssuanceInShareBasedArrangement_48" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_NumberOfPerformanceBasedAwardsAvailableForIssuanceInShareBasedArrangement_49" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_50" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DescriptionOfMaximumTermOfOptionsGrantedForSharebasedPaymentArrangement_51" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_52" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_VestingPercentageOfStockOptions_53" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_54" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_55" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_ExpenseReversalOfShareBasedPaymentForfeitures_56" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_57" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_58" order="130" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/StockOptionsScheduleOfScheduleOfIncentiveStockOptionsGrantedUnderPlanDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateAxis" xlink:label="loc_gpvrf_StockOptionsExpiryDateAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateDomain" xlink:label="loc_gpvrf_StockOptionsExpiryDateDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateMay42023Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateMay42023Member_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateNovember302023Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateNovember302023Member_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateFebruary122024Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateFebruary122024Member_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateJanuary302025Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateJanuary302025Member_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateFebruary112025Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateFebruary112025Member_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateJuly32025Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateJuly32025Member_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateNovember192025Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateNovember192025Member_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateDecember42025Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateDecember42025Member_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateMay182026Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateMay182026Member_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateDecember102026Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateDecember102026Member_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateJuly042027Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateJuly042027Member_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateNovember022027Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateNovember022027Member_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateFebruary142028Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateFebruary142028Member_13"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateMarch272029Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateMarch272029Member_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateMarch282028Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateMarch282028Member_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateJune282029Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateJune282029Member_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateMarch142030Member" xlink:label="loc_gpvrf_StockOptionsExpiryDateMarch142030Member_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_StockOptionsExpiryDateDomain" xlink:label="loc_gpvrf_StockOptionsExpiryDateDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:label="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_22"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOutstandingShareOptions" xlink:label="loc_ifrs-full_NumberOfOutstandingShareOptions_23"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_24"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_25"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_26"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_27"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_28"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_29"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_30"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_31"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:label="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_32"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_StockOptionsExpiryDateAxis_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateMay42023Member_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateNovember302023Member_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateFebruary122024Member_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateJanuary302025Member_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateFebruary112025Member_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateJuly32025Member_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateNovember192025Member_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateDecember42025Member_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateMay182026Member_9" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateDecember102026Member_10" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateJuly042027Member_11" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateNovember022027Member_12" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateFebruary142028Member_13" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateMarch272029Member_14" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateMarch282028Member_15" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateJune282029Member_16" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_StockOptionsExpiryDateDomain_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateMarch142030Member_17" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_StockOptionsExpiryDateAxis_1" xlink:to="loc_gpvrf_StockOptionsExpiryDateDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_22" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfOutstandingShareOptions_23" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_24" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_25" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_26" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_27" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_28" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_29" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_30" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_31" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_32" order="110" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/StockOptionsScheduleOfWeightedAverageAssumptionsUsedForValuationOfStockOptionGrantsDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShareOptionsMember" xlink:label="loc_ifrs-full_ShareOptionsMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:label="loc_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExercisePriceShareOptionsGranted2019" xlink:label="loc_ifrs-full_ExercisePriceShareOptionsGranted2019_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:label="loc_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" xlink:label="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:label="loc_ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ExpectedForfeitureRateOfShareOptionsGranted" xlink:label="loc_gpvrf_ExpectedForfeitureRateOfShareOptionsGranted_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted" xlink:label="loc_ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted_12"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" xlink:to="loc_ifrs-full_ShareOptionsMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="loc_ifrs-full_TypesOfAntidilutiveInstrumentsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_ExercisePriceShareOptionsGranted2019_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_10" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_gpvrf_ExpectedForfeitureRateOfShareOptionsGranted_11" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0" xlink:to="loc_ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted_12" order="70" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/DeferredRevenueNarrativeDetails">
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DisclosureOfDeferredRevenueLineItems" xlink:label="loc_gpvrf_DisclosureOfDeferredRevenueLineItems_0"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DisclosureOfDeferredRevenueTable" xlink:label="loc_gpvrf_DisclosureOfDeferredRevenueTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AllElectricVehiclesNotDeliveredMember" xlink:label="loc_gpvrf_AllElectricVehiclesNotDeliveredMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredIncomeIncludingContractLiabilities" xlink:label="loc_ifrs-full_DeferredIncomeIncludingContractLiabilities_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CurrentPortionOfDeferredRevenueIncludesFinancingComponentNonCashTransaction" xlink:label="loc_gpvrf_CurrentPortionOfDeferredRevenueIncludesFinancingComponentNonCashTransaction_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RecognizedDeferredRevenue" xlink:label="loc_gpvrf_RecognizedDeferredRevenue_8"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gpvrf_DisclosureOfDeferredRevenueLineItems_0" xlink:to="loc_gpvrf_DisclosureOfDeferredRevenueTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gpvrf_DisclosureOfDeferredRevenueTable_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_1" xlink:to="loc_gpvrf_AllElectricVehiclesNotDeliveredMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_1" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDeferredRevenueLineItems_0" xlink:to="loc_ifrs-full_DeferredIncomeIncludingContractLiabilities_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDeferredRevenueLineItems_0" xlink:to="loc_gpvrf_CurrentPortionOfDeferredRevenueIncludesFinancingComponentNonCashTransaction_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_DisclosureOfDeferredRevenueLineItems_0" xlink:to="loc_gpvrf_RecognizedDeferredRevenue_8" order="30" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/FinancialInstrumentsNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable" xlink:label="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="loc_ifrs-full_TypesOfRisksAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="loc_ifrs-full_TypesOfRisksDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MarketRiskMember" xlink:label="loc_ifrs-full_MarketRiskMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CreditRiskMember" xlink:label="loc_ifrs-full_CreditRiskMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="loc_ifrs-full_TypesOfRisksDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LionTruckBodyIncorporatedMember" xlink:label="loc_gpvrf_LionTruckBodyIncorporatedMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets" xlink:label="loc_gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable" xlink:label="loc_gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable_16"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OperatingLineOfCredit" xlink:label="loc_gpvrf_OperatingLineOfCredit_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings" xlink:label="loc_ifrs-full_Borrowings_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsMaturity" xlink:label="loc_ifrs-full_BorrowingsMaturity_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PercentageChangeInBaseRateOrPrimeRate" xlink:label="loc_gpvrf_PercentageChangeInBaseRateOrPrimeRate_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComprehensiveLossDueToChangeInBaseOrPrimeRate" xlink:label="loc_gpvrf_ComprehensiveLossDueToChangeInBaseOrPrimeRate_21"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClosingForeignExchangeRate" xlink:label="loc_ifrs-full_ClosingForeignExchangeRate_22"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PercentageOfChangeExchangeRate" xlink:label="loc_gpvrf_PercentageOfChangeExchangeRate_23"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ValueAtRisk" xlink:label="loc_ifrs-full_ValueAtRisk_24"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_1" xlink:to="loc_ifrs-full_TypesOfRisksAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_1" xlink:to="loc_ifrs-full_TypesOfRisksDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_1" xlink:to="loc_ifrs-full_MarketRiskMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_1" xlink:to="loc_ifrs-full_CreditRiskMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_1" xlink:to="loc_ifrs-full_TypesOfRisksDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_1" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_6" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_6" xlink:to="loc_gpvrf_LionTruckBodyIncorporatedMember_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_6" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_1" xlink:to="loc_ifrs-full_RangeAxis_10" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_10" xlink:to="loc_ifrs-full_RangeDomain_10" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_10" xlink:to="loc_ifrs-full_TopOfRangeMember_10" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_10" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountsForCreditLossesOfFinancialAssets_15" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_AdjustmentsForAllowanceForCreditLossesInProfitOrLossWriteDownOfPromissoryNoteReceivable_16" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_OperatingLineOfCredit_17" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_Borrowings_18" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsMaturity_19" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_PercentageChangeInBaseRateOrPrimeRate_20" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_ComprehensiveLossDueToChangeInBaseOrPrimeRate_21" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_ClosingForeignExchangeRate_22" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_PercentageOfChangeExchangeRate_23" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_ValueAtRisk_24" order="100" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/FinancialInstrumentsScheduleOfFinancialCommitmentsByMaturityDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="loc_ifrs-full_MaturityAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanThreeMonthsMember" xlink:label="loc_ifrs-full_NotLaterThanThreeMonthsMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:label="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_3"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ThereafterMember" xlink:label="loc_gpvrf_ThereafterMember_4"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="loc_ifrs-full_MaturityDomain_Default"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditCurrent" xlink:label="loc_gpvrf_LineOfCreditCurrent_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities" xlink:label="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermBorrowings" xlink:label="loc_ifrs-full_ShorttermBorrowings_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings" xlink:label="loc_ifrs-full_Borrowings_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConvertiblePreferredShareLiability" xlink:label="loc_gpvrf_ConvertiblePreferredShareLiability_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CurrentPortionOfContingentLiability" xlink:label="loc_gpvrf_CurrentPortionOfContingentLiability_16"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotesAndDebenturesIssued" xlink:label="loc_ifrs-full_NotesAndDebenturesIssued_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="loc_ifrs-full_OtherCurrentLiabilities_18"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="loc_ifrs-full_FinancialLiabilities_19"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable_1" xlink:to="loc_ifrs-full_MaturityAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_NotLaterThanThreeMonthsMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_1" xlink:to="loc_gpvrf_ThereafterMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_1" xlink:to="loc_ifrs-full_MaturityDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_gpvrf_LineOfCreditCurrent_9" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_10" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_11" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_12" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_ShorttermBorrowings_13" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_Borrowings_14" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_gpvrf_ConvertiblePreferredShareLiability_15" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_gpvrf_CurrentPortionOfContingentLiability_16" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_NotesAndDebenturesIssued_17" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_OtherCurrentLiabilities_18" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems_0" xlink:to="loc_ifrs-full_FinancialLiabilities_19" order="110" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/FinancialInstrumentsScheduleOfExposedToCurrencyRiskThroughFinancialAssetsAndLiabilitiesDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="loc_ifrs-full_TypesOfRisksAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="loc_ifrs-full_TypesOfRisksDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrencyRiskMember" xlink:label="loc_ifrs-full_CurrencyRiskMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="loc_ifrs-full_TypesOfRisksDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Cash" xlink:label="loc_ifrs-full_Cash_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ValueAddedTaxReceivables" xlink:label="loc_ifrs-full_ValueAddedTaxReceivables_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Prepayments" xlink:label="loc_ifrs-full_Prepayments_9"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceLeaseReceivables" xlink:label="loc_ifrs-full_FinanceLeaseReceivables_10"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherPayables" xlink:label="loc_ifrs-full_TradeAndOtherPayables_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_RelatedPartyLoanAndInterestsPayable" xlink:label="loc_gpvrf_RelatedPartyLoanAndInterestsPayable_12"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_1" xlink:to="loc_ifrs-full_TypesOfRisksAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_1" xlink:to="loc_ifrs-full_TypesOfRisksDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_1" xlink:to="loc_ifrs-full_CurrencyRiskMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_1" xlink:to="loc_ifrs-full_TypesOfRisksDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_Cash_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_ValueAddedTaxReceivables_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_Prepayments_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_FinanceLeaseReceivables_10" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_ifrs-full_TradeAndOtherPayables_11" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_0" xlink:to="loc_gpvrf_RelatedPartyLoanAndInterestsPayable_12" order="70" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/CapitalManagementNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems" xlink:label="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalTable" xlink:label="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PlaceholderMember" xlink:label="loc_gpvrf_PlaceholderMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UnderwrittenOfferingMember" xlink:label="loc_gpvrf_UnderwrittenOfferingMember_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="loc_ifrs-full_CashAndCashEquivalents_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WorkingCapitalSurplusDeficit" xlink:label="loc_gpvrf_WorkingCapitalSurplusDeficit_11"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarnings" xlink:label="loc_ifrs-full_RetainedEarnings_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-full_Equity_13"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalTable_1" xlink:to="loc_srt_RangeAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1" xlink:to="loc_ifrs-full_RangeDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_1" xlink:to="loc_gpvrf_PlaceholderMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_5" xlink:to="loc_gpvrf_UnderwrittenOfferingMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_5" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0" xlink:to="loc_ifrs-full_CashAndCashEquivalents_10" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0" xlink:to="loc_gpvrf_WorkingCapitalSurplusDeficit_11" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0" xlink:to="loc_ifrs-full_RetainedEarnings_12" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_0" xlink:to="loc_ifrs-full_Equity_13" order="40" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/RelatedPartyTransactionsNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:label="loc_ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FwpHoldingsLlcMember" xlink:label="loc_gpvrf_FwpHoldingsLlcMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_KokoFinancialServicesIncMember" xlink:label="loc_gpvrf_KokoFinancialServicesIncMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointControlOrSignificantInfluenceMember" xlink:label="loc_ifrs-full_JointControlOrSignificantInfluenceMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BCLtdMember" xlink:label="loc_gpvrf_BCLtdMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BrendanRileyMember" xlink:label="loc_gpvrf_BrendanRileyMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CountrymanInvestmentsLtdMember" xlink:label="loc_gpvrf_CountrymanInvestmentsLtdMember_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_BoardOfDirectorsChairmanMember" xlink:label="loc_srt_BoardOfDirectorsChairmanMember_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SecuritiesLendingMember" xlink:label="loc_ifrs-full_SecuritiesLendingMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FamilyOfficesOfRelatedPartiesMember" xlink:label="loc_gpvrf_FamilyOfficesOfRelatedPartiesMember_10"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BeneficiallyOwnedByDirectorsAndOfficerMember" xlink:label="loc_gpvrf_BeneficiallyOwnedByDirectorsAndOfficerMember_11"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_BeneficiallyOwnedByCEOAndDirectorMember" xlink:label="loc_gpvrf_BeneficiallyOwnedByCEOAndDirectorMember_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherRelatedPartiesMember" xlink:label="loc_ifrs-full_OtherRelatedPartiesMember_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_17"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingMember" xlink:label="loc_gpvrf_TermLoanOfferingMember_17"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingFirstTrancheMember" xlink:label="loc_gpvrf_TermLoanOfferingFirstTrancheMember_18"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingSecondTrancheMember" xlink:label="loc_gpvrf_TermLoanOfferingSecondTrancheMember_19"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingThirdTrancheMember" xlink:label="loc_gpvrf_TermLoanOfferingThirdTrancheMember_20"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingFourthTrancheMember" xlink:label="loc_gpvrf_TermLoanOfferingFourthTrancheMember_21"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOfferingFifthTrancheMember" xlink:label="loc_gpvrf_TermLoanOfferingFifthTrancheMember_22"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermBorrowingsMember" xlink:label="loc_ifrs-full_ShorttermBorrowingsMember_23"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanOneMember" xlink:label="loc_gpvrf_TermLoanOneMember_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TermLoanTwoMember" xlink:label="loc_gpvrf_TermLoanTwoMember_25"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LineOfCreditAndTermLoanMember" xlink:label="loc_gpvrf_LineOfCreditAndTermLoanMember_26"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConvertibleInstrumentsMember" xlink:label="loc_ifrs-full_ConvertibleInstrumentsMember_27"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesBConvertiblePreferredSharesMember" xlink:label="loc_gpvrf_SeriesBConvertiblePreferredSharesMember_28"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UnsecuredAndNonInterestBearingLoanMember" xlink:label="loc_gpvrf_UnsecuredAndNonInterestBearingLoanMember_29"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_33"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_33"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EventsAfterReportingPeriodMember" xlink:label="loc_gpvrf_EventsAfterReportingPeriodMember_33"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_37"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_37"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FWPAcquisitionCorpMember" xlink:label="loc_gpvrf_FWPAcquisitionCorpMember_37"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="loc_ifrs-full_RangeAxis_41"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_41"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="loc_ifrs-full_BottomOfRangeMember_41"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="loc_ifrs-full_TopOfRangeMember_42"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="loc_ifrs-full_RangeDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:label="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_47"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingCostsIncurred" xlink:label="loc_ifrs-full_BorrowingCostsIncurred_48"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseOnBorrowings" xlink:label="loc_ifrs-full_InterestExpenseOnBorrowings_49"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OutstandingCommitmentsMadeByEntityRelatedPartyTransactions" xlink:label="loc_ifrs-full_OutstandingCommitmentsMadeByEntityRelatedPartyTransactions_50"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CommitmentsMadeByEntityRelatedPartyTransactions" xlink:label="loc_ifrs-full_CommitmentsMadeByEntityRelatedPartyTransactions_51"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="loc_ifrs-full_BorrowingsInterestRate_52"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OtherNonCashGain" xlink:label="loc_gpvrf_OtherNonCashGain_53"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_PersonalGuaranteeAmountToSupportOperatingLineOfCredit" xlink:label="loc_gpvrf_PersonalGuaranteeAmountToSupportOperatingLineOfCredit_54"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_JointGuaranteeAmountToSupportOperatingLineOfCredit" xlink:label="loc_gpvrf_JointGuaranteeAmountToSupportOperatingLineOfCredit_55"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="loc_ifrs-full_NotionalAmount_56"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsMaturity" xlink:label="loc_ifrs-full_BorrowingsMaturity_57"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanNonCashGain" xlink:label="loc_gpvrf_LoanNonCashGain_58"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsTerm" xlink:label="loc_gpvrf_WarrantsTerm_59"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfWarrantsIssued" xlink:label="loc_gpvrf_NumberOfWarrantsIssued_60"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageSharePrice2019" xlink:label="loc_ifrs-full_WeightedAverageSharePrice2019_61"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:label="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_62"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:label="loc_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities_63"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentPayablesToRelatedParties" xlink:label="loc_ifrs-full_NoncurrentPayablesToRelatedParties_64"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NumberOfSharePurchaseWarrantsGranted" xlink:label="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_65"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_FwpHoldingsLlcMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_KokoFinancialServicesIncMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_ifrs-full_JointControlOrSignificantInfluenceMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_BCLtdMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_BrendanRileyMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_CountrymanInvestmentsLtdMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_srt_BoardOfDirectorsChairmanMember_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_ifrs-full_SecuritiesLendingMember_9" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_FamilyOfficesOfRelatedPartiesMember_10" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_BeneficiallyOwnedByDirectorsAndOfficerMember_11" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_gpvrf_BeneficiallyOwnedByCEOAndDirectorMember_12" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_1" xlink:to="loc_ifrs-full_OtherRelatedPartiesMember_13" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_17" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_17" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_17" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingMember_17" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingFirstTrancheMember_18" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingSecondTrancheMember_19" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingThirdTrancheMember_20" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingFourthTrancheMember_21" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOfferingFifthTrancheMember_22" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_ifrs-full_ShorttermBorrowingsMember_23" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanOneMember_24" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_TermLoanTwoMember_25" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_LineOfCreditAndTermLoanMember_26" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_ifrs-full_ConvertibleInstrumentsMember_27" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_SeriesBConvertiblePreferredSharesMember_28" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_17" xlink:to="loc_gpvrf_UnsecuredAndNonInterestBearingLoanMember_29" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_17" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_33" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_33" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_33" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_33" xlink:to="loc_gpvrf_EventsAfterReportingPeriodMember_33" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_33" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_37" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_37" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_37" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_37" xlink:to="loc_gpvrf_FWPAcquisitionCorpMember_37" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_37" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_1" xlink:to="loc_ifrs-full_RangeAxis_41" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_41" xlink:to="loc_ifrs-full_RangeDomain_41" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_41" xlink:to="loc_ifrs-full_BottomOfRangeMember_41" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_41" xlink:to="loc_ifrs-full_TopOfRangeMember_42" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_41" xlink:to="loc_ifrs-full_RangeDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_47" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_BorrowingCostsIncurred_48" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_InterestExpenseOnBorrowings_49" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_OutstandingCommitmentsMadeByEntityRelatedPartyTransactions_50" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_CommitmentsMadeByEntityRelatedPartyTransactions_51" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRate_52" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_OtherNonCashGain_53" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_PersonalGuaranteeAmountToSupportOperatingLineOfCredit_54" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_JointGuaranteeAmountToSupportOperatingLineOfCredit_55" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_NotionalAmount_56" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_BorrowingsMaturity_57" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_LoanNonCashGain_58" order="120" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_WarrantsTerm_59" order="130" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_NumberOfWarrantsIssued_60" order="140" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageSharePrice2019_61" order="150" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_62" order="160" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities_63" order="170" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_ifrs-full_NoncurrentPayablesToRelatedParties_64" order="180" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_0" xlink:to="loc_gpvrf_NumberOfSharePurchaseWarrantsGranted_65" order="190" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/IncomeTaxesNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NonCapitalLossCarryForwardsMember" xlink:label="loc_gpvrf_NonCapitalLossCarryForwardsMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OperatingLossesCarryForwardsMember" xlink:label="loc_gpvrf_OperatingLossesCarryForwardsMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="loc_ifrs-full_GeographicalAreasAxis_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="loc_country_US_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="loc_country_CA_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ApplicableTaxRate" xlink:label="loc_ifrs-full_ApplicableTaxRate_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ReduceTaxableIncomeForFuture" xlink:label="loc_gpvrf_ReduceTaxableIncomeForFuture_13"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised" xlink:label="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_14"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_TaxRateUsedToMeasureTaxRecoveryOnEquityComponentOfConvertibleDebenture" xlink:label="loc_gpvrf_TaxRateUsedToMeasureTaxRecoveryOnEquityComponentOfConvertibleDebenture_16"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_NonCapitalLossCarryForwardsMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_OperatingLossesCarryForwardsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1" xlink:to="loc_ifrs-full_GeographicalAreasAxis_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_GeographicalAreasAxis_6" xlink:to="loc_ifrs-full_GeographicalAreasDomain_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_6" xlink:to="loc_country_US_6" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_6" xlink:to="loc_country_CA_7" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_GeographicalAreasAxis_6" xlink:to="loc_ifrs-full_GeographicalAreasDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_ApplicableTaxRate_12" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_gpvrf_ReduceTaxableIncomeForFuture_13" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_14" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_15" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_gpvrf_TaxRateUsedToMeasureTaxRecoveryOnEquityComponentOfConvertibleDebenture_16" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/IncomeTaxesScheduleOfNatureAndEffectOfTheTemporaryDifferencesGivingRiseToTheDeferredIncomeTaxAssetsDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_NonCapitalLossCarryForwardsMember" xlink:label="loc_gpvrf_NonCapitalLossCarryForwardsMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CapitalAssetsMember" xlink:label="loc_gpvrf_CapitalAssetsMember_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RightofuseAssetsMember" xlink:label="loc_ifrs-full_RightofuseAssetsMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_4"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WarrantyProvisionMember" xlink:label="loc_ifrs-full_WarrantyProvisionMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DeferredRevenueMember" xlink:label="loc_gpvrf_DeferredRevenueMember_6"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ShareIssueCostsMember" xlink:label="loc_gpvrf_ShareIssueCostsMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OtherCarryforwardBalancesMember" xlink:label="loc_gpvrf_OtherCarryforwardBalancesMember_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_UnrecognizedDeferredTaxAssetsMember" xlink:label="loc_gpvrf_UnrecognizedDeferredTaxAssetsMember_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain" xlink:label="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_14"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_NonCapitalLossCarryForwardsMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_CapitalAssetsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_ifrs-full_RightofuseAssetsMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_ifrs-full_WarrantyProvisionMember_5" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_DeferredRevenueMember_6" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_ShareIssueCostsMember_7" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_OtherCarryforwardBalancesMember_8" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_1" xlink:to="loc_gpvrf_UnrecognizedDeferredTaxAssetsMember_9" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesAxis_1" xlink:to="loc_gpvrf_ComponentsDeferredTaxAssetsAndLiabilitiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0" xlink:to="loc_ifrs-full_DeferredTaxLiabilityAsset_14" order="10" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMajorCustomersLineItems" xlink:label="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMajorCustomersTable" xlink:label="loc_ifrs-full_DisclosureOfMajorCustomersTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_OneCustomerMember" xlink:label="loc_gpvrf_OneCustomerMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InformationAboutMajorCustomers" xlink:label="loc_ifrs-full_InformationAboutMajorCustomers_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherIncome" xlink:label="loc_ifrs-full_OtherIncome_7"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PercentageOfEntitysRevenue" xlink:label="loc_ifrs-full_PercentageOfEntitysRevenue_8"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_VehicleSalesRevenueFromGovernmentGrants" xlink:label="loc_gpvrf_VehicleSalesRevenueFromGovernmentGrants_9"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SalesRevenueFromVehiclesPreviouslyOnLeases" xlink:label="loc_gpvrf_SalesRevenueFromVehiclesPreviouslyOnLeases_10"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfMajorCustomersTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersTable_1" xlink:to="loc_srt_MajorCustomersAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_1" xlink:to="loc_srt_NameOfMajorCustomerDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_1" xlink:to="loc_gpvrf_OneCustomerMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_1" xlink:to="loc_srt_NameOfMajorCustomerDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_InformationAboutMajorCustomers_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_OtherIncome_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_ifrs-full_PercentageOfEntitysRevenue_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_VehicleSalesRevenueFromGovernmentGrants_9" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersLineItems_0" xlink:to="loc_gpvrf_SalesRevenueFromVehiclesPreviouslyOnLeases_10" order="50" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfRevenuesAllocatedByGeographyDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="loc_ifrs-full_GeographicalAreasAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="loc_country_US_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="loc_country_CA_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Revenue" xlink:label="loc_ifrs-full_Revenue_7"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" xlink:to="loc_ifrs-full_GeographicalAreasAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_GeographicalAreasAxis_1" xlink:to="loc_ifrs-full_GeographicalAreasDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_1" xlink:to="loc_country_US_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_1" xlink:to="loc_country_CA_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_GeographicalAreasAxis_1" xlink:to="loc_ifrs-full_GeographicalAreasDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_Revenue_7" order="10" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SegmentedInformationDisclosureOfPropertyAndEquipmentAllocatedByGeographyDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="loc_ifrs-full_GeographicalAreasAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="loc_country_US_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="loc_country_CA_2"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="loc_ifrs-full_GeographicalAreasDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_7"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" xlink:to="loc_ifrs-full_GeographicalAreasAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_GeographicalAreasAxis_1" xlink:to="loc_ifrs-full_GeographicalAreasDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_1" xlink:to="loc_country_US_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasDomain_1" xlink:to="loc_country_CA_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_GeographicalAreasAxis_1" xlink:to="loc_ifrs-full_GeographicalAreasDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_7" order="10" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/SegmentedInformationAndOtherAdditionalDisclosuresScheduleOfCostsAllocatedToExpenseCategoriesAndToCostOfSalesDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncomeStatementsLoacationAxis" xlink:label="loc_gpvrf_IncomeStatementsLoacationAxis_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncomeStatementsLoacationDomain" xlink:label="loc_gpvrf_IncomeStatementsLoacationDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_AdministrativeFeesMember" xlink:label="loc_gpvrf_AdministrativeFeesMember_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ProductDevelopmentCostsMember" xlink:label="loc_gpvrf_ProductDevelopmentCostsMember_2"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SalesAndMarketingMember" xlink:label="loc_gpvrf_SalesAndMarketingMember_3"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfSalesMember" xlink:label="loc_ifrs-full_CostOfSalesMember_4"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncomeStatementsLoacationDomain" xlink:label="loc_gpvrf_IncomeStatementsLoacationDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WagesAndSalaries" xlink:label="loc_ifrs-full_WagesAndSalaries_9"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsTable_1" xlink:to="loc_gpvrf_IncomeStatementsLoacationAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gpvrf_IncomeStatementsLoacationAxis_1" xlink:to="loc_gpvrf_IncomeStatementsLoacationDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_IncomeStatementsLoacationDomain_1" xlink:to="loc_gpvrf_AdministrativeFeesMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_IncomeStatementsLoacationDomain_1" xlink:to="loc_gpvrf_ProductDevelopmentCostsMember_2" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_IncomeStatementsLoacationDomain_1" xlink:to="loc_gpvrf_SalesAndMarketingMember_3" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gpvrf_IncomeStatementsLoacationDomain_1" xlink:to="loc_ifrs-full_CostOfSalesMember_4" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gpvrf_IncomeStatementsLoacationAxis_1" xlink:to="loc_gpvrf_IncomeStatementsLoacationDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsLineItems_0" xlink:to="loc_ifrs-full_WagesAndSalaries_9" order="10" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/AcquisitionOfLionTruckBodyNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsLineItems" xlink:label="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfBusinessCombinationsTable" xlink:label="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LionTruckBodyIncorporatedMember" xlink:label="loc_gpvrf_LionTruckBodyIncorporatedMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="loc_ifrs-full_LongtermBorrowings_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="loc_ifrs-full_BorrowingsInterestRate_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_DerecognizedContingentLiability" xlink:label="loc_gpvrf_DerecognizedContingentLiability_8"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_1" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_1" xlink:to="loc_gpvrf_LionTruckBodyIncorporatedMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_1" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_0" xlink:to="loc_ifrs-full_LongtermBorrowings_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_0" xlink:to="loc_ifrs-full_BorrowingsInterestRate_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_0" xlink:to="loc_gpvrf_DerecognizedContingentLiability_8" order="30" use="optional"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://www.greenpowerbus.com/role/EventsAfterTheReportingPeriodNarrativeDetails">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_EventsAfterReportingPeriodMember" xlink:label="loc_gpvrf_EventsAfterReportingPeriodMember_1"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_FwpHoldingsLlcMember" xlink:label="loc_gpvrf_FwpHoldingsLlcMember_5"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_KokoFinancialServicesIncMember" xlink:label="loc_gpvrf_KokoFinancialServicesIncMember_6"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherRelatedPartiesMember" xlink:label="loc_ifrs-full_OtherRelatedPartiesMember_7"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CountrymanInvestmentsLtdMember" xlink:label="loc_gpvrf_CountrymanInvestmentsLtdMember_8"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_12"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanOneMember" xlink:label="loc_gpvrf_LoanOneMember_12"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanTwoMember" xlink:label="loc_gpvrf_LoanTwoMember_13"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanThreeMember" xlink:label="loc_gpvrf_LoanThreeMember_14"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanFourMember" xlink:label="loc_gpvrf_LoanFourMember_15"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_LoanFiveMember" xlink:label="loc_gpvrf_LoanFiveMember_16"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermBorrowingsMember" xlink:label="loc_ifrs-full_ShorttermBorrowingsMember_20"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_24"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesAPreferenceSharesMember" xlink:label="loc_gpvrf_SeriesAPreferenceSharesMember_24"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesBPreferenceSharesMember" xlink:label="loc_gpvrf_SeriesBPreferenceSharesMember_25"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OrdinarySharesMember" xlink:label="loc_ifrs-full_OrdinarySharesMember_26"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_SeriesBPreferenceSharesTwoMember" xlink:label="loc_gpvrf_SeriesBPreferenceSharesTwoMember_27"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_Default"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_32"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_33"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:label="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_34"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="loc_ifrs-full_ProceedsFromIssuingShares_35"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_IncreaseInCommitmentToIssuePreferredShares" xlink:label="loc_gpvrf_IncreaseInCommitmentToIssuePreferredShares_36"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesReclassifiedIntoEquity" xlink:label="loc_ifrs-full_FinancialLiabilitiesReclassifiedIntoEquity_37"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_38"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_WarrantsExercisePrice" xlink:label="loc_gpvrf_WarrantsExercisePrice_39"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_CommonStockConversionPricePerShare" xlink:label="loc_gpvrf_CommonStockConversionPricePerShare_40"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ConversionOfLoansConvertedAmount" xlink:label="loc_gpvrf_ConversionOfLoansConvertedAmount_41"/>
    <loc xlink:type="locator" xlink:href="gpvrf-20260331.xsd#gpvrf_ShareIssuedPricePerShare" xlink:label="loc_gpvrf_ShareIssuedPricePerShare_42"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestPayable" xlink:label="loc_ifrs-full_InterestPayable_43"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" order="0" use="optional" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_1" xlink:to="loc_gpvrf_EventsAfterReportingPeriodMember_1" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_1" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_FwpHoldingsLlcMember_5" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_KokoFinancialServicesIncMember_6" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_ifrs-full_OtherRelatedPartiesMember_7" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_5" xlink:to="loc_gpvrf_CountrymanInvestmentsLtdMember_8" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_12" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_12" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_12" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_12" xlink:to="loc_gpvrf_LoanOneMember_12" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_12" xlink:to="loc_gpvrf_LoanTwoMember_13" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_12" xlink:to="loc_gpvrf_LoanThreeMember_14" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_12" xlink:to="loc_gpvrf_LoanFourMember_15" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_12" xlink:to="loc_gpvrf_LoanFiveMember_16" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_12" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_20" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_20" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_20" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_20" xlink:to="loc_ifrs-full_ShorttermBorrowingsMember_20" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_20" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_1" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_24" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_24" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_24" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_24" xlink:to="loc_gpvrf_SeriesAPreferenceSharesMember_24" order="0" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_24" xlink:to="loc_gpvrf_SeriesBPreferenceSharesMember_25" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_24" xlink:to="loc_ifrs-full_OrdinarySharesMember_26" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_24" xlink:to="loc_gpvrf_SeriesBPreferenceSharesTwoMember_27" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_24" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_Default" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_32" order="10" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019_33" order="20" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_34" order="30" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_ProceedsFromIssuingShares_35" order="40" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_gpvrf_IncreaseInCommitmentToIssuePreferredShares_36" order="50" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_FinancialLiabilitiesReclassifiedIntoEquity_37" order="60" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_38" order="70" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_gpvrf_WarrantsExercisePrice_39" order="80" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_gpvrf_CommonStockConversionPricePerShare_40" order="90" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_gpvrf_ConversionOfLoansConvertedAmount_41" order="100" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_gpvrf_ShareIssuedPricePerShare_42" order="110" use="optional"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_0" xlink:to="loc_ifrs-full_InterestPayable_43" order="120" use="optional"/>
  </definitionLink>
</linkbase>
