All questions regarding the GSC.

Doesn't it interfere? Have you tried it?

As far as I understand, the difference is that the map generated by the editor and then edited has to be loaded "artificially" (for this, we simply sent the map file via ICQ, installed it in the "Maps" folder, and played), while a regular map, generated during a multiplayer game, is loaded for the other player automatically, without any additional tricks like sending files, etc.