Question: who is guppy on icarly?
Answer: Guppy Gibson (Ethan Munck) is Gibby's younger brother. He first appears in "iPsycho" when he visits Gibby, who is staying with Spencer and Carly. Guppy later frees the iCarly gang from a recording booth while Gibby distracts Nora (the girl who trapped the iCarly gang).