Can we link our gog tw3 version to our steam account?

[Shelledfade]

Can we link our gog tw3 version to our steam account?

in the same way that I was able to put tw1-tw2 from steam onto my gog account?

 

[ReptilePZ]

As far as I know, only retail copies are getting gog back-up keys. I don't think it's possible.