GOG.com had a nice feature called GOG Connect, which allowed us to import selected games from our Steam libraries to our GOG collections. This feature was loved by many users, but we have some bad news. GOG Connect is unfortunately stopped, and will not be active again.
One of the reasons mentioned by GOG is that there was no activity to keep it going. Their offers were time-limited and they provided a very short time for players to import any games. As much as getting some extra DRM-free copies by GOG was a great benefit for many players who used their services, we can not blame them for the decision they had to make.