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Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives and Residual Value and Intangible Assets Useful Life (Details)	Mar. 31, 2025
Software copyrights [Member]
Property, Plant, and Equipment and Intangible Assets [Line Items]
Intangible assets estimated useful life	5 years
Office equipment and furnishing [Member]
Property, Plant, and Equipment and Intangible Assets [Line Items]
Property plant and equipment useful life	5 years
Property plant and equipment estimated residual value	5.00%

X

- References

No definition available.

+ Details

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Namespace Prefix:	gdc_
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Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Balance Type:
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