I don't think Gia is dumb, she's playing a character just like everyone else. In fact, Gia is most likely in the lead as the queen with the most "airtime" on the show so far. Who has the most .gifs on this forum? Gia (umm, and Vivacious

). Do I think she's going to win the season, heck maybe even make the top 3? No and probably not, but I love her drag character. I can't see why others see her as the bitch of the season. She throws a lot of shade, yes, but so far everyone else on the cast has as well. She's not as bad as the Heathers, Phi Phi, or Roxxxy... and with Bianca reading girls left to right she doesn't even come close to being the bitch of the season. Based on the previews of untucked and what we've seen so far, she's not one of the queens backstage stirring drama. Not trying to get others to like her, but that's just my two cents... I don't think she's / that / bad.
With that said, I'm rooting for Bianca this season. If I had to pick two more for a top 3, I'd pick Milk and Ben de la Creme/Trinity/Adore would be my wildcards for the third spot. I also love Courtney, Gia, and April but so far they're only giving me pretty.