Mr. Gus is a major character in Uncle Grandpa. He is a dinosaur man that protects Uncle Grandpa. He lives with Uncle Grandpa, Pizza Steve, and Giant Realistic Flying Tiger in the RV. He is very calm, unlike his friends, and is a very serious character. In "Haunted RV", he dresses as a creepy clown, he makes a head and hatchet made of balloons. After Uncle Grandpa puts Frankenstein's brain into his RV to connect by transforming into the haunted house and kidnapped the 3 teens, Mr. Gus suggested they can rescue them. After they defeat Frankenstein's brain, his RV went to normal, the teens running away in fear and Uncle Grandpa in Frankenstein's body found their candies, he asked if they eat the candies first or gets their brains back, they suggested they eat first.