stupid school stuff

There's this kid at school who I'm like 99% is gay(he's the only guy on the cheerleading squad). We don't really know each other very well, but I was wondering if it would be weird for me to DM him and ask him if he is gay(he already accepted my follow request on instagram). I probably wouldn't be able to do it in person because we don't have any classes together and people would overhear us talking. I'm pretty sure he's out and school and I just wanted to ask him if people treat him well at school so that maybe I could gauge what it would be like if I came out. I just want to know if this would be a little weird or if its crossing a line or something.