FG creator and executive producer is a leftwinger, not a rightwinger, that's well doumented I think.
And I think FG does alright in other countries. I know it's one of those shows that's translated into like a gjillion different languages. I think even American Dad, which has a "rightwing" lead character, I think gas a decent enough audience abroad. Probably because they get what's being done with that show, which is - it's sort of a fake right wing show that ultimately comes back toward the left morally. It's always about how dumbass rightwing Stan messes something up and it has to be fixed, and he learns his lesson - UNTIL NEXT TIME!
But personally I don't think there's any grounds at all to even suggest that there's somehow a correlation between extreme right-wing Fox News, and an animated comedy show by a left-wing writer.
It just doesn't really make any sense to me, at least.