Gah made his appearance when Timmy wished for a body of a 16 year old, but would still have the mind of his 10 year old body, so that he could ride on the Heart Stopper at Adrenaland. Vicky found him, began to crush on him, and when she asked him what was his name was, Timmy yelled "Gah!" in surprise. Vicky later says "What kind of name is 'Gah'?" Timmy tells her a Norwegian name. Throughout the remainder of the episode, "Gah!" is treated as an actual existing celebrity supermodel, even by Timmy's friends and family. A few people are seen taking pictures of him and selling on the Internet. People also buy Gah calendars, dolls and other merchandise off of it too.