Sync your steam account

It's a bug.

I have the same problem, and yes i do sync my acc daily after a purchase
i use this to hide the games that are visible and i own or don't need them.

http://www.steamgifts.com/forum/u2zKI/steamgifts-plus-filtering-ignoring-tagging-better-editor-new-comment-highlighting-more

The problem is Steam doesn't show Game of Dwarves on the library, so Steamgifts can't detect it without seeing. It's not a SG bug, but it might be a Steam bug.

It works for me :)

if it dose not work for you it is your browser that are having a problem :)

If you install the game and play it, then re-sync, it will appear in your list

At least, that worked for the last person I talked to about it.