Represents the limit of current ratio under the line of credit.

No definition available.

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

- Definition

Represents fair value of share purchase warrants granted.

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of shares issued as bonus shares for entering a loan

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of shares issued as bonus shares for providing loan guarantees

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the line of credit balance.

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represent the information about the line of credit increased margin.

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the value of threshold limit of line of credit.

+ References

No definition available.

+ Details

Name:	gpvrf_LineOfCreditMaximumLimit
Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents about number of share purchase warrants granted.

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of bonus shares and warrants for providing loan guarantees

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Value of bonus shares for entering loan

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the value of guarantees provided by directors

+ References

No definition available.

+ Details

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Namespace Prefix:	gpvrf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=gpvrf_RevolvingDemandLineOfCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_BorrowingsByNameAxis=gpvrf_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_BorrowingsByNameAxis=gpvrf_LenderMember
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Data Type:	na
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Data Type:	na
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Line of Credit (Narrative) (Details) - USD ($)			12 Months Ended
Line of Credit (Narrative) (Details) - USD ($)	Jan. 12, 2026	Jan. 06, 2026	Mar. 31, 2026	Mar. 31, 2025	Jan. 08, 2026
Disclosure of detailed information about borrowings [Line Items]
Description of current ratio limit under line of credit				1.25:1
BMO Bank Of Montreal [Member]
Disclosure of detailed information about borrowings [Line Items]
Maximum credit limit under line of credit					$ 6,000,000
Line of credit basis of interest rate				the line of credit with the BMO Bank of Montreal was bearing interest at BMO's US Base Rate (March 31, 2025 - 8.0%) plus a margin of 5.25%
Line of credit increased margin				2.25%
Line of credit, balance				$ 5,983,572
Revolving demand line of credit facility with CIBC [Member]
Disclosure of detailed information about borrowings [Line Items]
Maximum credit limit under line of credit	$ 3,000,000
Borrowings	3,000,000
Line of credit basis of interest rate			The revolving demand line of credit facility with CIBC bears interest at CIBC's US base rate (March 31, 2026 - 7.25%) plus 1.35%
Line of credit, balance			$ 1,452,615
Term loan with CIBC [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	2,000,000
Description of current ratio limit under line of credit			1.25:1
Lenders [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings		$ 5,000,000
Lender one [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings		$ 2,500,000
Number of warrants granted		3,205,128
Exercise price of warrants granted		$ 0.78
Fair value of warrants granted		$ 500,000
Lender two [Member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings		$ 2,500,000
Number of bonus shares for entering loan		641,025
Value of bonus shares for entering loan		$ 500,000
Director one [Member]
Disclosure of detailed information about borrowings [Line Items]
Number of warrants granted		2,016,129
Exercise price of warrants granted		$ 1.24
Fair value of warrants granted	$ 500,000
Director two [Member]
Disclosure of detailed information about borrowings [Line Items]
Number of bonus shares for providing loan guarantees		403,225
Two Directors [Member]
Disclosure of detailed information about borrowings [Line Items]
Value of guarantees provided by directors		$ 5,000,000
Value of bonus shares and warrants for providing loan guarantees		$ 1,000,000