Does anybody know how to import your saves from Gateway into Treasures?

This is probably easiest if you run Dosbox manually instead of using GoG's launchers.

1) Launch Dosbox
2) Mount both the Gateway and Treasures folders in this one Dosbox instance
3) Go into the Treasures folder, START, select "reconfigure" and indicate both directory paths when prompted
4) You should now be able to load your Gateway game into Treasures without trouble

While doing that I stumbled onto a much easier way, it turns out there is a GATEWAY folder inside Treasures of the Savage Frontier. You just need to copy the SAVE folder from gateway into the GATEWAY folder and it can load from them.

Just wanted to say thank you so much for posting this!!!!!