Odds are you'd have a mix, of guys who aren't attracted, and guys who are. Can depend on a myriad of factors like taste, just like men aren't necessarily attracted to all women.

I would think the proportion of GL parents who are attracted to daughter woud be higher than someone adult-attracted. This is because there is not as much time to be not-attracted and grow familiar in an asexual loving sense before anything potential creeped up.

This is as opposed to say... a 50yo father who is attracted to girls 25+ being attracted to his 26 yo daughter. While she's in AoA, she's had 24 years where she hasn't been. All the more time for that... familiarity syndrome thing or whatever they call it that prevents incest, to kick in.