The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=GEHI_RandsdaleResourcesLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_FortyFourToTwentyFourPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=GEHI_SaleOfMerchandiseManagementFeeAndRoyaltyFeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_AllegianceClementiPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=GEHI_ServiceFeeRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=GEHI_PurchaseOfServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_AllegianceJurongEastPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_MulberryLearningCentreCbpPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_MulberryLearningCentreCentralPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_SunbirdChildDevelopmentCentrePteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=GEHI_StrategicEduhubPteLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED PARTY TRANSACTION - Related party transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Randsdale Resources Limited
RELATED PARTY TRANSACTION
Ownership percentage	15.00%
44 to 24 Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	$ 3	$ 4	$ 3
Allegiance (Clementi) Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	41	38	30
Allegiance (Clementi) Pte Ltd \| Service fee revenue
RELATED PARTY TRANSACTION
Amount of related party transactions		2
Allegiance (Clementi) Pte Ltd \| Purchase of service
RELATED PARTY TRANSACTION
Amount of related party transactions	3
Allegiance (Jurong East) Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	41	38	31
Allegiance (Jurong East) Pte Ltd \| Service fee revenue
RELATED PARTY TRANSACTION
Amount of related party transactions			3
Mulberry Learning Centre @ CBP Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions		15
Mulberry Learning Centre @ CBP Pte Ltd \| Service fee revenue
RELATED PARTY TRANSACTION
Amount of related party transactions		6
Mulberry Learning Centre @ CBP Pte Ltd \| Purchase of service
RELATED PARTY TRANSACTION
Amount of related party transactions	3	12
Mulberry Learning Centre Central Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	13	265	365
Mulberry Learning Centre Central Pte Ltd \| Service fee revenue
RELATED PARTY TRANSACTION
Amount of related party transactions	11	29	81
Mulberry Learning Centre Central Pte Ltd \| Purchase of service
RELATED PARTY TRANSACTION
Amount of related party transactions	203	245	11
The Sunbird Child Development Centre Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	9
The Sunbird Child Development Centre Pte Ltd \| Service fee revenue
RELATED PARTY TRANSACTION
Amount of related party transactions	2
Strategic Eduhub Pte Ltd \| Sale of merchandise, management fee and royalty fee
RELATED PARTY TRANSACTION
Amount of related party transactions	4	$ 45	$ 43
Strategic Eduhub Pte Ltd \| Purchase of service
RELATED PARTY TRANSACTION
Amount of related party transactions	$ 4