The Xq28 gene is not found in women. A study in 1995 proved that. The scientists tested gay men and lesbians to see if the Xq28 gene was present in all of them.
But they only found it in males.
Xq28 does not make men gay. The only thing it does is cause the existence of sexuality in the first place. It might increase the urge of men to have a sexual attraction to other men, but it’s not guaranteed. Ultimately, it’s a choice of the individual.
The Xq28 gene should not be considered the “gay gene”. A lot of research still needs to be done to see if genes actually determine sexuality or not. In terms of Xq28, it only influences urges. Since anyone can resist urges, being gay is a choice.