It is an inside joke between me fujinn, Amon and Traqqy. Yes the word gay has been used in other guest diffs that I have taken part in. It is not used as a way to mock gay ppl! An example of a guest diff w the same name gimmick that is also about to be ranked: https://osu.ppy.sh/beatmapsets/2027947#osu/4294788
Hope this helps resolve the issue!