Advance payments received amount.

No definition available.

Name:	GTLL_AdvancePaymentsReceviedAmount
Namespace Prefix:	GTLL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Balance Type:	na
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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Balance Type:	credit
Period Type:	instant

- 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.

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Period Type:	duration

- Definition

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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SCHEDULE OF NOTE RECEIVABLE (Details) (Parenthetical) - USD ($)		12 Months Ended
	Dec. 14, 2021	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Modified [Line Items]
Repayments of related party debt			$ 9,749
Senior Secured Promissory Note [Member] \| Tersus Power, Inc [Member]
Financing Receivable, Modified [Line Items]
Debt instrument face amount	$ 500,000
Maturity date description	The Note shall bear interest at 5% annually, be amortized over 25 years and the Borrower shall pay the full amount of principal and interest in one balloon payment on December 14, 2026 (the “Maturity Date”).
Bear interest rate, percentage	5.00%
Maturity date	Dec. 14, 2026
Advanced payment amount	$ 37,500
Repayments of related party debt			$ 350,000
Senior Secured Promissory Note [Member] \| Tersus Power, Inc [Member] \| Maximum [Member]
Financing Receivable, Modified [Line Items]
Advance borrower fund, amount	$ 500,000