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Income Tax - Schedule of Movement in Deferred Tax Assets (Liabilities) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Schedule of Movement in Deferred Tax Assets (Liabilities) [Abstract]
Balance at beginning	$ (115,460)	$ (514,675)
Recognized in profit or loss	233,848	669,869
Recognized in goodwill		(36,973)
Foreign exchange differences reserve	1,752	(2,761)
Balance at ending	$ 351,060	$ 115,460

X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences recognized in profit or loss.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of increase (decrease) in valuation allowance for deferred tax asset recognized in goodwill.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of increase (decrease) in valuation allowance for deferred tax asset foreign exchange differences reserve.

+ References

No definition available.

+ Details

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

X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration