I mean, research has been done. That's where those numbers came from. And now that there's a shit ton of detransitioners coming out, there's studies starting on them. I saw an informal one that was really just a survey, so the results can't really be trusted, but it seems that the vast majority of female detransitioners are autistic and that the majority of males were just flamboyant gay dudes. It seems to me from what I've read and from my own experience that it's less autism and GD being linked and more autists jumping on the bandwagon as autists will always do and think they're trans because they're fucking autistic and don't know any better.
None of this applies to Trisha though. She's not autistic, she's just a very audacious attention whore. Anyone who is discussing her as if she is legitimately trans or is being serious is a clown because it's Trisha.
Edit: I don't want to clog the thread anymore, but I just want to add that the high amount of autismos being diagnosed as GD is already known in the medical community and action has been taken. If you're going in for a GD diagnosis and it's not an informed consent clinic, they will give you a psych eval including an interview and that's pretty in-depth in that they'll watch for any signs of autism. This was the case in two different areas across the USA, so I'd bet that it's a common-ish practice at the very least. I don't know if this affects whether or not you get the GD diagnosis if they do see any signs of autism, but considering how a diagnosis of depression or bipolar can lower your chances, I'd bet that it probably does.