Almost no straight man knows his clothing by designer name. Everything is just jeans, shorts, and short unless they like being douches and wear expensive name brands to show off and say "I'm wearing _______, cost me like $200 lol".
I can't call a guy gay based on him wearing a certain designer's piece unless they're assless chaps.
I had to Google that, and I am straight, so that is likely your first hint to "no". I have never seen a straight man wear anything on that website. I have never seen anyone wear anything on that website, actually, but the products they make are clearly for a gay audience.