Not sure for gay, but futa protagonist is already a tag.
Unfortunately, no. A gay/lesbian MC tag should exist to avoid these confusions.
That what is problem there, there are actually games that give no warning until you have agreed some action, even sometimes is you made decision by beliving its woman hour of text back and then story is position where some action happens and you realy dont have choice if you wish to continue this game. And also there is games where story is written as visual novel where you dont have choice at all. And thats why i think there should be separation.
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has some warning but in pas i have stumbled on games where is actually no warning at all and no choices at all. And thouse still continue on same tag as normal. So usually i have learned to avoid games that have those tags to not take risk.
I think this would be a fair cause to substract 1-2 stars on a review, just like unavoidable and surprise gay/lesbian content (yeah, I'm not happy at all with forced lesbian content). Unavoidable content of divisive tags like futa/trans, gay/lesbian, NTR, etc... should be noted in the OP. I have the futa/trans and gay tags on my game, but I specified on the OP how much content they have and if they are avoidable or not. Those examples you gave it is a bad design on the game.
But to play devil's advocate, most games here are not uploaded by their creators, it's mostly by uploaders, and they might not know of certain tags, or if they are avoidable or not. And it isn't fair to the devs because they didn't upload the game here in the first place.
The most sensitive thing to do when a game have these tags, is to take a look at the thread, someone will always ask of those tags are avoidable or not. Always. A clue to detect a gay protagonist game? no boobs or women on the banner/screenshots. I use the reverse idea to discard games that only have 1 gay scene, and not have a gay MC.
Don't get me started on the gay/lesbian protagonist tags. In the thread about them some people point me as a LGBT Karen for demanding them because they also want their precious MILF protagonist tags tags too. Maybe it would be good to add your point of view as a straight gamer too. I think they are needed, especially on a system like the one on F95, where tags are used as warning more than an indicator of major content.
But anyway... they are not accepting new tag suggestions until the tag system update, so in the end, this will be ignored by the staff. Again.