You can sit weirdly on chairs, you can walk fast. You can keysmash and wear rainbow colors. You can love cottagecore, cowboys, yaoi, fanfiction, Animal Crossing, poetry. You can say dyke, faggot, queer. You can make pride flags and put your neopronouns in your bio. You can go to pride, go to GSA meetings, and gay bars.
But you will never be gay unless you are same sex attracted. Not same gender attracted, not a "gay trans boy" (straight female) or "transbian" (straight male). You must be homosexual. As in, you are attracted to people with the same genitals as you.
I know genuine gay people want to bond over things they have in common with other LGBs (e.g videogames, aesthetics, media) but let's never forget that there is only one universal gay quality: same sex attraction.