CONDENSED STATEMENTS OF OPERATIONS (Parentheticals) - Class B Ordinary Shares [Member]	Mar. 25, 2025 USD ($) shares
Surrender shares (in shares) \| shares	1,354,317
Shares surrendered, value (in Dollars) \| $	$ 0

Number of common stock shares surrendered to entity.

No definition available.

Name:	gteru_CommonStockSharesSurrendered
Namespace Prefix:	gteru_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant