Name:	gpvrf_AdjustmentsForImpairmentLossRecognisedInProfitOrLossWriteDownOfPromissoryNoteReceivable
Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents carrying value of leased asset at estimated useful life of 12 years.

No definition available.

Name:	gpvrf_CarryingValueOfLeasedAssetAtEstimatedUsefulLifeOf12Years
Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents carrying value of leased asset at estimated useful life of 7 years.

No definition available.

Name:	gpvrf_CarryingValueOfLeasedAssetatEstimatedUsefulLifeOf7Years
Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents reduction in depreciation expense due to change in estimated useful life of leased assets.

No definition available.

Name:	gpvrf_ReductionInDepreciationExpense
Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

No definition available.

Name:	gpvrf_SignificantAccountingPoliciesLineItems
Namespace Prefix:	gpvrf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Description of useful life used for property, plant and equipment. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2019-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_c&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_DescriptionOfUsefulLifePropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The increase (decrease) in the allowance account for credit losses of financial assets resulting from adjustments arising from the passage of time. [Refer: Allowance account for credit losses of financial assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2019-03-27

Name:	ifrs-full_IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountForCreditLossesOfFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of cost related to the issuance of shares.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_ShareIssueRelatedCost
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The weighted average lessee's incremental borrowing rate applied to lease liabilities recognised in the statement of financial position at the date of initial application of IFRS 16. The incremental borrowing rate is the rate of interest that a lessee would have to pay to borrow over a similar term, and with a similar security, the funds necessary to obtain an asset of a similar value to the right-of-use asset in a similar economic environment.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph C12
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_C12_a&doctype=Appendix&subtype=C
-URIDate 2019-03-27