There is no such thing as a gay Catholic.
If I understand Church doctrine (and I'm not a Catholic, nor do I play one on TV) correctly, that's not correct. I believe homosexual orientation is accepted, just not active practice of homosexual sex. IOW, hate the sin, love the sinner (as are we all).
There is also no such thing as same-sex “marriage”. Marriage is the union of one man and one woman and all the Anthony Kennedys in the world cant change that basic fact. I could give a damn less what some liberal or faggot thinks about the truth.
There are those who have SSAD, but are celibate. I know a few.
It is hard path for them, and one that is made much worse by well meaning people who encourage them to fall into sin and be “happy”.
I reckon it depends on what you mean by "Gay," and what you mean by "Catholic".
I certainly know people n the Catholic Church who would tell you they are gay. The particular ones I am thinking about, in my parish, are not "coupled" and as far as I know, follow the faith and morals of the Church and are chaste.