|~ Gino Terwilliger's catchphrase|
Gino was born in the Italian village of Salsiccia to Bob Terwilliger (a.k.a. Sideshow Bob, who sought a new life as mayor of the village) and Francesca Terwilliger. When Sideshow Bob's life was ruined, he followed Sideshow Bob and Francesca as they tracked the Simpsons down in Rome. He, along with his mother, helped Bob to try to kill the Simpsons. After Krusty saves the Simpsons family, he chases a butterfly.
After failing to kill the Simpsons, he and his family fled to England where Bob got a job as a chimney brusher. He and his family tour around England going to Buckingham Palace, Sherlock's museum, and rowing a boat (Gino is seen using a megaphone telling his parents to row). Eventually, Bob, Francesca, and Gino sneak back to the US on a train. Gino and the rest of his family constructed a trap to kill the Simpsons by building a phony barbeque restaurant and constructing a commercial about it. All of this was told by Sideshow Bob.
After Sideshow Bob's relatives hatch an ultimate plan to kill Bart Simpson but fails, he and his family were caught and thrown into prison in the same cell as Slideshow Bob.
- Gino appears about a year older than Maggie, but never existed until The Italian Bob.
- Gino is a lot like his father; sharing his looks and hatred for Bart Simpson.
- Gino is the youngest character to have been put in prison. Though Mr. Burns wanted Maggie thrown in prison for shooting him, Wiggum refused to put her in because she is a baby.
- Gino can play cards which he does with his grandfather and uncle when he's in prison