It would be incredibly difficult, I would think for a gay man to be open in fraternities. It would depend greatly on the fraternity though, but the heavily masculine "typical" fraternities I would think would be hell in the University I go to. The University is progressive when it comes to gay rights, especially within the State, but Fraternities as much as they are part of the College scene, are out side of the circle in a sense. The University can enforce rules when things get out of hand, but they're definitely not breathing down the neck of the presidents belonging to these Fraternities.
Anyway, where did you watch it? It would've been an interesting thing to watch.