errr... a gun? you shoot game (hunting animals)
GrowGardenGropeGreetGiggleGobble
Gin???
Greenwich
glee
Garbage Disposal
golf cart
Grapes Grease
Girl.
You could say Go, Goodbye or Get out of here. They start with the letter g.
Gary PaulsenGizzardGorgeGrouseGully
Guggenheim Museum