You can tell him that there are also current, active JW's here, and there are others that have never been JW's, such as myself, that might be married to JW's, just interested in WT-related problems, etc...
Also, it might be worth it to get him to confront the reality that the WT will never accept homosexuals (unless of course some miraculous "new light" emerges. lol) and that he WILL have to face up to that at some point, and he might as well start inspecting whether or not the WT is the "Truth" after all. One way to quickly get him to see some major problems is by getting him to look into all the major false prophecies and predictions the WT has made in the past... all failed (if the links don't work, please copy and past them, and they will work that way!):
http://www.freeminds.org/history/history.htm
See the links in the box to the right dealing with prophecies? Check those out! Also, here's a link to the book, "Millions Now Living Will Never Die," which is where some really interesting links about the 1925 prophecy about the major patriarchs being ressurrected can be found:
http://www.strictlygenteel.co.uk/millions/millions.html
There may be some threads with people that are ex-JWs that are gay on this forum, too, though I wouldn't know how to find them. The search option never works for me. Even if he does look into things and agrees there are problems, then he'd have to face the likelihood of being DF'd and possibly not being able to talk to family and/or friends that are active JW's. I wish the best!