Free Gay Pix might have a name that suggests it's all about images, but this site actually has a nice collection of gay stories if you know where to look. Thankfully, I'm a god when it comes to hunting new types of homoerotic pleasures, so it didn't take long for me to source the thousands of X-rated texts available on FreeGayPix.com. I counted a total well over 2,000 - if it's quantity and quality you're after, this may be the place to get both.
The stories aren't archived in a terribly neat fashion and make it clear that getting in and reading the text is all that matters. Story titles range from 'Uncle Rob in the Restroom' through to 'The Bookstore'. I'd say that most of the stories are written by average gay dudes and that there isn't much in the way of professional material. Though of course, that's pretty much the best type of gay erotic story, right?