Gil is a bespectacled, gray-haired frog, one of a trio of Mad Ave Advertising executives who work on the Ocean Breeze Soap account in The Muppets Take Manhattan. Gil and his colleagues, Bill and Jill, recruit the amnesiac Kermit to work with them after he comes up with the brilliant slogan, "Ocean Breeze Soap will get you clean." They also have a habit of using words that rhyme with their names.
Gil has since made several background appearances in Muppet productions. In a series of National Wildlife Federation PSAs, Gil and his two partners run another ad agency, aptly named "Frog Frog & Frog Advertising." In the 2000 video game Muppet RaceMania, he, Bill, and Jill appear as bosses, and he also appeared as one of the members for The All Amphibian Band for Kermit and Jimmy Buffett's duet of "Caribbean Amphibian" from Elmopalooza.
- The Muppets Take Manhattan
- The Jim Henson Hour
- The Muppets at Walt Disney World
- 1991 National Wildlife Federation commercial, performed by Kevin Clash
- Muppets Tonight
- Muppet RaceMania video game
- Muppets Most Wanted (wedding attendee)