Is colton gillies and trevor gillies related?

Answer 1

No. This is taken from an article that interviewed him.

Sharing the same last name as Islanders' four-time Stanley Cup champion, Clark Gillies, you'd think that Trevor was reading about a relative, but as he explains to every new person that sees him with the Islander crest on his jersey, they are not related.

"I can't even count how many times people have asked me if we were related," Trevor said. "It would be a true honor to call him one of my relatives. He could do it all, hit fight and score."

Answer 2

No.