Crosmando: So I am curious about the games sold and distributed through the Humble Bundle website. You can download DRM-free versions from the site itself, and some titles give you a Steam key too, but is there any relation to GOG? As in, if you buy a game on the Humble Bundle site, and it comes to GOG, do you get a redeemable key here too?
Retro City Rampage is the only game that lets you pick a GOG key option over a Steam key from the Humble store I think.
Edit: Searched and found a list of Humble Store games, RCR is the only one to give the option.
http://pcgamingwiki.com/wiki/Humble_Store No games have ever given out GOG keys from any of the humble bundles or specials. They used to give Desura keys long ago but stopped shortly before Indie Royale started. Groupees and Indie Game Stand have given GOG keys for a few games though.