Was searching combinations of gay, Satanist and brotherhood online, because I remember some years back there was The Brotherhood SSRB, though I also remember they had a neo-Nazi vibe that turned me off. Most of the current results were not helpful, until https://www.collectorsrealm3.net/, which besides having a fantastic collection of retro porn images and clips, lists The GSB on the site's Links page. So I should probably thank Jack Drago for guiding me here. Hail Lucifer. Hail Satan.