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Other Long-Term Liabilities (Details) - Schedule of other long-term liabilities - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Schedule of other long-term liabilities [Abstract]
Subsidy	$ 1,812,759	$ 2,212,938
Total	$ 1,812,759	$ 2,212,938

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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