Wooh, another pansexual man!
Honestly, I haven't found any issues with the gay community in person. I'd say the best bet if you're alright with talking about it, is if someone wants to start becoming intimate just be up front with them. Let them know you're trans, and have different plumbing.
This isn't an option for everyone, some people want to stay 100% in stealth, some prefer to never talk about it, some feel extreme dysphoria with their nether regions, and some simply don't want to have to explain to people what's going on down there. But for those who can do it, this might be your best bet. Some guys will respond and be very confused, some will be very interested, some will dismiss you immediately. It happens.
But for those who are curious or interested, you'll probably answer a couple questions, and then you can offer to keep going if they seem into it.
But don't feel bad, or get upset if someone turns you down because of it, or dismisses you. Remain calm, and even upbeat if you can. Let them know that's alright, and just go your separate ways.
You don't want to get upset or aggressive just because someone else has very strong preferences. It's THEIR deal, not yours.
But the end result for many gay men it seems, is that if you sound male, smell male, and look male, it wont change their experience one bit, so keep your chin up.