|Lesbian, Gay, and Bi Super-Heroes|
You bet. There are quite a few of them out there, but only some of them are published by major companies like DC or Marvel. DC has the most, but at the big publishers, gay characters are more likely to be members of the supporting cast (maybe a friend of the hero) or their orientation is merely hinted at. That's starting to change, though, as a few gay heroes have come out in the past few years. Most of these characters are pretty recent, though there are some that go back surprisingly far.
You want details? The COMPLETE answer is HERE. It's a somewhat large file, so I've turned the inline images into links. You can choose which ones you want to see, without sucking up the bandwidth to download all of them at once.