I've been there (Ao Nang).

No gay bars, no hits on the phone apps and no gay massage.

There are about 2 mixed massage places which had some male masseurs. Location of one is:
https://www.google.co.uk/maps/place/....8188558?dcr=0

I had a massage in there & one of the masseurs was insisting on 1000 tip for hand relief only. The maximum anyone has ever asked me for in Bangkok or Pattaya for the same service is 600. I refused & he swapped one of his fellow masseurs in to finish me off.

The location of the other was on the way back down to the beach.

There was a street with about 10 girly hostess bars, so it's yet another destination where the gay scene is under represented.