Ok, so March 2nd, (which is coming up), is the one-year anniversary of my coming out from last year. I think it might be time to actually come out to my entire family that day, on March 2nd, comparing to last year, when i told friends. Yeah, I know my dad's the stereotypical mexican tough-religious type of guy, but he has a transgendered brother-to-sister, and he seems to be Ok with it to a certain extent, y'know? I honestly think it's not gonna be that bad, i know my mom, out of everyone, might accept me a lot more faster than everyone else, but I guess i'll see.
If your dad has a MTF sibling, and he's ok with it at all, I wouldn't see him having a problem with a gay son. I know it's not the same, but it's similar. Good luck though, and do tell us of the results.