Link games to gog galaxy account so I would have them in my library? I own Bastion and Torchlight 2. I bought them from their sites.

As of yet, no. The feature of code redemption is new and only a handful of games can be redeemed, here. They say "more titles in the future", at least, though. Those you mentioned above, certainly not, for the time being that is.

GOG doesn't even sell Torchlight 2?

Thank you so much!

I think what OP meant is how to add game *not* from GOG to GOG Library or GOG Galaxy.

For the time being the only way to do this is to create the GOG Galaxy metadata files manually by hand, however you can copy a metadata file from another game to the directory of the game you wish to add to Galaxy, then edit the file in a text editor to customize it for the specific game. There are instructions somewhere in the forums here on how to do that if you need assistance with it. Once you have a metadata file in place you should be able to import it into Galaxy to use Galaxy as a launcher. Of course it will just be a launcher (like adding a non-Steam game to Steam) and not integrate with any Galaxy features such as achievements, and the games wont show up in your GOG game library shelf, but just on the installed launcher list on the left side.

Hope this helps.

There are detailed instructions ins this thread. I haven't tried it myself (I don't use Galaxy), so I can't vouch for how accurate or easy they are to follow.

Thank you!