The problem is that Gene Simmons likes Trump, so i don’t think he would say that he is:
"Simmons isn’t blind to Trump’s words, however, adding, “Do I think he said a lot of stupid things? Oh, yeah. But I know the man, by the way — we hung and all that stuff. What you see is what you get. He says stupid things, and so do you, and so [do] I. I’m not validating it, but, there’s not a human being that walks on the face of the planet that privately hasn’t made racist, or anti-Semitic, or anti-women jokes, or anti-Irish jokes. Privately, everybody does it. He is a Tourette’s president who will say whatever he wants and he doesn’t give a f–k if you approve of him and he’s doing the job for one dollar. I like that.”"
Read More: Gene Simmons: Trump a ‘Tourette’s President,’ We All Say ‘Stupid Things’ | http://loudwire.com/kiss-gene-simmons-donald-trump-tourettes-president-all-say-stupid-things/?trackback=tsmclip
So my guess is that he tries to defend Trump by saying he have tourette’s syndrome, but that is just a insult to people with tourette’s syndrome.