Gaago is a mummy-like creature whose head is wrapped in bandages, and wears a pointed green hat. He has a long tongue, as well floating yellow hands and feet, and a green torso. Gaago's body appears to be hollow, as shown by his defeat pose.
Gaago first appears in Bust-A-Move 2 as the first opponent fought in the game's Practice Mode. Before the match, he jumps toward Bub and licks him, causing him to fall over in surprise. Gus is a secret playable character in the console version's Puzzle Mode, unlocked by entering a code on the map screen.
Gaago has a small cameo in Bust-A-Move 3, appearing in the form of a capsule toy in the background of Priccio's stage.