As a gay realtor I found the answers on this page amusing to say the least. It's funny how our federal government considers race, religion, sex, marital status, etc., a "protected" class (and that includes steering and redlining) but legally it is the individual states who choose whether to "protect" the rights of gay, lesbian and transgender people. (No, I don't consider "bi" to be a viable lifestyle. Look at Anne Heche.) But it's partially because of the attitudes prevalent in our wonderful country (which start with our brilliant leaders) that make asking questions like this necessary. Generally, our country has progressed--For instance, in Seattle the "gay ghetto" is being replaced as the gays scatter and have long been accepted everywhere, though the original "hood" is still here and is still the first place I recommend to my gay clients. Other ways we have progressed include the fact that employers can't refuse to hire a woman because she's married, or pregnant, or the wrong ethnicity. But according to the feds--If she identifies as lesbian it is perfectly ok to deny her a job, or housing. No one chooses to be a certain race, and no one chooses to be gay. But I would argue that religion IS a choice, so why is that protected? G/L/T people have long been TARGETED by bigots and closet cases so I have no problem "steering" them to a place where they'll be accepted and feel safe.
Sorry, got on my soapbox. The best way to get an answer to this question is to find a gay realtor who works in the area you're interested in.