Thank you for the report. We are aware of this issue, and it's tracked internally. However, we are not sure when it will be fixed.

There was a mod that fixed the issue if I could find it. I do know that the compositions in Game Master are different from the ones in Conflict in a few ways. The US hospital the Game Master can spawn is larger than the one that can be constructed.

I found the mod! It still works in 1.8.0.10 and it's named "JRM Supply Fix", and it was made by "JustJustice".

The description says it modifies the supply system to bypass the game mode check which disables the supply system.

Thank you. I will add it to the ticket.