It don´t have any problem. If he is gay, and his character is also gay, not a problem at all. What can make him interesting is a good history and good acting, things that will make persons to like of his presence in the show. Simple like this.
I have friends (and a cousin too) that are gay, and they are good and cool persons. Everybody knows they are gay, and they don´t need to put a flame in your or in any other face, just to tell they are gay. They are gay and they are normal. Inteligent, gentle and educated persons. You don´t have any reason to leave them apart or do not have a friendship with them. They are welcome.
The problem is with gays (and not gays that act similar to this way) that have the desire to appears a lot, the desire to be "the last sweet coconut in the world". These ones are irritating!! They come to you and say "hey, I´m gay, do you know?" "Do you like to know why I´m gay?" "You can be gay too, don´t you know?, it´s cool!" "You know that everybody is gay in the end, don´t you know?" "Gays are the best persons in the world, cause, bla, bla, bla..." "Let me talk to your kids how cool is to be a gay. Maybe they are gay too!!". It´s cause of them that a lot of persons tends do not tolerate gays. Well, gays like these can go to the hell!!