How do i sell my game on here?

Use this form to contact them:

http://www.gog.com/en/support/contact/business

? This is a place where you buy games, not sell them... It is a digital distributor like Steam, GamersGate etc.

First, you need to make a total baller game. Bad games are accepted only if you're a big name hotshot. It is important to note that you're not qualified as a judge of the quality of your game. Then you need to contact GOG through the link spindown presented and convince the GOG team that your game is a total baller, and reach an agreement about the terms and whatnot. That is if you want GOG to sell your game. If you just want to sell your game here, make a thread titled "I'm selling a game!" and ask if anyone's interested. If you want someone to buy it, you should probably give a description of it and provide media.

Accepting that, it would remove 75% of the catalog, don't you think?

It wouldn't hurt if you could show us some examples of your work. Do you have a website or some examples of games you have done previously?

Are you suggesting big game companies aren't big name hotshots? I don't think they've released a single indie title that's both bad and not well-known either, but I could be wrong, of course.

thanks