Both are hot, really hot. I'd love to date them both and it would be really cool. Though, I'm kind of scared that gigachad is sexist, but then again, the definition of chad depends on who's describing him.
Buuut... girlchad is really hot... and I'm into muscly, tough women with abs.. but I'm also into guys with abs as well.........
Okay, I think I'd choose them both.