Gaw Gaw is an enemy in Kirby Squeak Squad, which appears to be a mole or rodent. If one sees Kirby, it will jump at him and try to bite him. Sometimes, they will just jump in place without going after him. They give Kirby the Animal ability if eaten.
There is also a mini-boss called Gao Gao, which is a larger, blue version of Gaw Gaw. It also yields the Animal ability.