This is generally true IME.
Although to be fair I have a lot of gay male friends who don't mind young females drinking in gay bars. Don't mind isn't welcome of it just a 'ah well whatever'. They don't like it. The more aware of them including my closest gay male friend, have the stance that they understand why it is necessary and wish it wasn't. Others range from mild joking irritability 'ah great fanny fest in here again!' To 'why can't we have female only straight bars?!'
I love my gay male friends, and I wish it were safe for women to go out for drinks anywhere then everyone would be happy. Unfortunately the world isn't like that.
As a case in point, I'm a reasonably attractive 40 something. Over the last two years I've been chatted up by very much straight males,in gay bars.
Once I was alone. The barmaid had apparently told this man to not approach me, he was a regular. I'd been shopping and decided to pop in to read my book and have a couple of glasses of wines in the sun.
He was very interested but to be fair to him once I told him I was gay, he was respectful and we had a nice chat before he left me alone.
The other time wasn't so civil. I was wirh my previously mentioned ex dp and each time she left for the bar or the loo this man made a bee-line for me. He would not listen to my 'I'm gay, I'm with dp, please leave me alone' pleas at all. In the end I spotted a (gay) man whom I didn't know but recognised from a previous encounter and asked if I could move to stand near him. He agreed and this man didn't approach again then. My dp came back not long following, approached him and told him to leave me alone in no uncertain terms. Being confronted by a butch lesbian and being protected by a male (albeit a very obviously gay one) seemed to work.
I don't want straight men in gay spaces.
A lot of them have unisex loos for a start. Gay men are not a threat to me generally, straight ones are.
I am pleased when I see young women in gay bars. I am glad they're keeping themselves safe(r) however that safety has now been compromised with straight males entering these spaces, 'trans' or not.
I remember the days of having to kiss a girl to prove I were gay before entering certain bars! Maybe they should make men do that.