Simmons supported Trump in his first run, but apparently criticized him pretty strongly in 2022. It's unclear how he feels about him now. Paul Stanley has been a vocal Trump critic, but he seems to have an attitude of "can't we all just get along" so he will probably go along with it. I can't find anything definitive on Peter Criss' political views. I'm sure they'll show up. Simmons and Frehley are absolutely disgusting human beings - ironic that they apparently despise each other.
George Strait is well known as a right winger so he will definitely show up.
Stallone is also a well known batshit Trump Supporter. He'll be thrilled to show up.
I can find nothing on Michael Crawford's politics but something tells me he's probably a Trump supporter as well.
Gloria Gaynor has never been public with her politics, but I would like to think she is not a Trump supporter but I bet she was vetted to be sure she supports Trump before being named. To be honest, she is not remotely deserving of a Kennedy Center Honor. Sure, "I will Survive" is an iconic song, but there are hundreds or thousands more deserving musical artists than her.