Gt.Gt. (also Gt British English) adjective [only before noun] the written abbreviation of Great, used in names: 
Gt Britain
Gt Britain- countercharge
- counterclockwise
- counterculture
- counter-espionage
- counterfeit
- counterfeiter
- counterfoil
- counterinsurgency
- counterintelligence
- countermand
- countermeasure
- counterpane
- counterpart
- counterpoint
- counterproductive
- counter-revolution
- counter-revolutionary
- countersign
- countertenor
- counter-terrorism
- counter-terrorist
- countervailing
- countess
- counting house
- countless