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Taxes (Details) - Schedule of Deferred Tax Assets Valuation Allowance Movement - USD ($) $ in Thousands | Mar. 31, 2024 | Sep. 30, 2023
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Schedule of Deferred Tax Assets Valuation Allowance Movement [Abstract] |  |
Change to tax expense in current year | $ 186,122 | $ 228,862
Foreign currency translation adjustments | $ 9,893 | $ (27,023)

X
- Definition Represent the amount of change to tax expenses. + References No definition available. + Details
Name: | gsun_ChangetotaxExpenseInCurrentYear
Namespace Prefix: | gsun_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
Name: | us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant