Frank Fritz does not in any way whatsoever appear to be gay to me at all.
Along with working on the show, she also owns a retail shop which sells vintage items as well as some items she designed. Even if they stage scenes and plant items, there's no faking the history of some of these items. He's released multiple albums under his own name as well.
I went to his premiere at the Adler when his pilot episode aired the show was not picked up.