.GG File Extension
File Type 1Sega Game Gear ROM
What is a GG file?
Game ROM used by emulation programs for the Sega Game Gear handheld console; saves the game data exactly as it was stored on the game cartridge; used for playing Game Gear games on a computer using emulation software.
File Type 2Google Desktop Gadget File
.GG File Association 2
Gadget designed for Google Desktop, a desktop widget and application manager; often provides information such as news, finance, and sports stories, but also can include small games, search interfaces, and other types of simple programs.
NOTE: For Mac OS X, Google Desktop requires Mac OS X 10.5 or later.