Read up on it. I don't have any direct links, but I read a message board that discussed the Spanish words that were used in that final scene led a native spanish speaker to believe he was gay. Basically, Gus's buddy (can't remember his name) reffered to Gus as his "companero", which is spanish for companion, where as the word "blank" (I can't remember what the word was) would be used in Spanish to describe a business partner.
Also, the taunting that Hector does to both of them after he urinates in the pool by saying the two of them "like what they see", and he blew them three kisses. Could just be a way of demeaning his guests that he did not respect, but he could also be taunting the fact that they were gay.
There are conflicting reports with what was said on the podcast, where Vince said it was open to interpretation, but other producers hinted that it was true.
Again, not that applicable to the storyline at all, but an interesting debate.