R63 You are trying to reduce gay men to a bunch of stereotypes which is a very narrow-minded conception and very dehumanising way to see people since it makes you unable to acknowledge the diversity and complexity of human nature.
You will find gender non-conformist people who are heterosexual, homosexual and bisexual. Because of cultural condictioning, whenever you find a man who looks or behaves feminine you will think he is gay even if he tells you he is heterosexual or bisexual.
All valid entities that study sexuality are clear when stating that sexual orientation, gender identity and gender expression are all different aspects of someone's identity and they are not determined by one of the three.
You are being influenced by confirmation bias which means that you only notice examples that fit your conceptions of, in this gays, how supposedly gay men are collectively. You will not see the ones that don't match your conception of gay men and even if you notice them you will probably believe they are not being themselves.
It is worth asking, if sexual orientation determines gender expression, then how come not all gay men are effeminate? Even more, if effeminacy is inherently a homosexual trait, how come most gay men find effeminacy unattractive? If nature has decided that homosexual men must be effeminate then effeminacy should be naturally highly desirable and arousing sexually, right? But that's not the case.
The context under which homosexual men are born should never be overlooked since it plays a great role for its potential to affect aspects of our identity in some way or another.
From the book: One of the Children: Gay Black Men in Harlem by William G. Hawkeswood, Alex W. Costley:
"Most gay men are raised in heterosexual two-parent households, and whether or not parents are in fact heterosexual, their children perceive them as such. Furthermore, since heterosexuality is the dominant image portrayed in public, gaymen tend to be socialized according to heterosexual norms. If a gay man is attracted to other males as a child, consciously or not, his earliest model for interacting with men, emotionally, socially and sexually, may be female. From watching and interacting with his mother, sister, grandmothers, aunts, female cousins, and female friends, the gay black male may be less inclined than a non-gay male to reject femenine traits. This was the case among several of my informants. "
"Gay men are often perceived as being effeminate socially and passive sexually. Some men who are overlty effeminate in their gay social lives may in fact be modeling their behavior on that of females who played important roles in their socialization. They may feel they have to act effeminately to entice a man, regardless of what they might actually want to do with him sexually. Effeminate black men, "sissies" in Harlem, may also be acting on stereotypical models of gay men prescribed for them during their socialization by heterosexuals".
Wheter you are homosexual or not, gender expression is greatly affected/influenced by external factors.