Oliver and Gus are definitely only friends bc Brigette's rich friends wanted to set up a play date, right?
It's just, I'm watching the episode where Oliver's doing a school project with Skylar, Alan ad Gus, and Gus only asked Oliver about the cheeta thing. So it's not that he thinks everyone has cheetas, it's that he knows Oliver also comes from money (although money bridgette worked hard for kinda) so he figured he probably has at least 1.