Yes I did. I dated gay guys before transition. They weren't what I really wanted but those were the only guys available to me at the time and I was a horny 16 year old. I hadn't started HRT yet but I already wore makeup, wore black or blue nail polish, had long hair and pretty much looked like a flat chested girl. I only liked masculine gay guys and the 2 I dated before transition didn't care that I looked female though one of them told me my lack of facial and body hair was a slight turn off for him. Then when I was about 3 months into HRT I started dating this other guy. At first everything was ok but when he noticed the extreme sensitivity of my nipples he started asking questions. I told him I was trans and that I had started HRT. He didn't like that and he broke it off. A couple of months later I met another guy but when we started messing around he noticed I had boobs. Very small ones but enough that he could feel them. That was the end of him. After that I decided to not bother with gay guys anymore.
What I noticed with gay guys is that some of them don't care if you look feminine or even wear makeup. But if you've started hrt and get enough breast development for them to notice and feel then that's a total deal breaker. Then I met a straight guy who thought I was a girl. That went no where because I told him right up front I was trans and his response was " sorry, I'm not into ->-bleeped-<-s ". So I decided not to bother trying to date any guy until after SRS. I didn't date anyone for a year and then I happened to meet Tristan. He was accepting but his 2 concerns were that I had no facial or body hair and that I had actual boobs and not inserts. The same 2 things that were a turn off to gay guys were an important turn on to a straight guy.
That's my dating history before and after transition. I wish I could say dating during mid transition was no problem. But it can be. The worst period is when you are starting HRT. You're not feminine enough to interest a straight guy but once hrt starts taking effect gay guys will find you too feminine. There are bisexual guys but that's not a guarantee he will be interested in a transwomen. Bisexual guys like both guys and girls. But for some guys that means either or. Not someone who is in between.
Unfortunately dating is going to be hard at the beginning of transition. I would suggest you not bother with gay guys anymore. Even if you start dating him, as your body becomes more noticeably female, he will probably dump you. I'm not saying it's impossible to date someone at this point but I think it would be easier if you wait until your HRT has started taking effect and you look more feminine. Then you can maybe find an accepting straight or bi guy. There are girls here who haven't had SRS that have boyfriends, me included,so it's not impossible.
Good luck sweetie, I know its hard right now but it will get better.
Big hugs.