Gibby

Orenthal Cornelius Hayes "Gibby" Gibson is a very close friend of  Carly Shay,  Sam Puckett,  Freddie Benson, and  Spencer Shay, the son of  Charlotte Gibson, and the older brother of  Guppy. He was formally known for his peculiar habit of frequently taking off his shirt for no apparent reason. After Gibby is older, throughout the series, he grows out of taking of his shirt so much. He is often described by Sam as a "nerd" and is a recurring victim of her bullying. Although he is frequently pushed around, it's been shown that he can handle himself in a fight.

Gibby's character was portrayed by  Noah Munck.