Whenever I unlock an achievement in the game they don't show in GOG Galaxy. It simply states No achievements unlocked yet. Anyone else have this problem?

I Just recently complete the banner saga and unlocked achievements. Maybe you disabled achievements from your gog galaxy settings?

I actually just managed to get the achievements to unlock. Had to close and reopen Gog galaxy and restart the game, then all of a sudden all previous achievements popped up. Still, thanks for the reply!

Same problem for me...

Check if you have achievements disabled in gog galaxy. Also maybe your firewall is blocking access to gog galaxy? This has happened with other people.

Same thing too, weird but in the end it works...