Just to follow up on my previous post, no, my mind wasn?t playing tricks on me - Gary does indeed appear very briefly in ?Affair Weather Friends?. Here?s the proof (and though he is smiling in this screenshot, I noticed that he seemed very downcast until Mac referred to him):
Really, a kitten that adorable ought to have a whole waiting list of potential adopters. Whatever keeps him in the building with the possibility for more cameos in the future, I suppose.