My understanding as a former elder is as long as you are a NPG (non-practicing gay) you can be a JW however, you would never be able to be an elder, a ministerial servant, or a pioneer. And you would NEVER be able to practice your sexuality.
As in our whole society, many are more tolerent of Homosexual's as long as they don't live in our backyard, the witnesses are much like the world they will tolerate you as long as you don't act too gay.
Good luck with your endevours and remember you will be disfellowshipped if you do have a homosexual affair