If it's the actual GORE rules you're looking for, you can
download the PDF of them at RPGNow.com for free or get the
hardcopy version through Lulu.com for $7.20. There are no official GORE adventures or settings produced by Goblinoid Games AFAK. I'm not certain if third-parties have produced some and made them available.
GORE is an OGL version of the percentile-based rule system introduced with RuneQuest and made OGL by Mongoose Games. There's no implicit setting, but the rules cover the basic of everything from fantasy to modern to future settings, making it a perfect resource for referees who want to use it as the backbone for a setting and homebrew lots of goodies on top of it--which is what I've been using it for to great success!