Hmm, interesting... Can the GSC place objects on maps that are not in the original game (from mods)? Then it would be possible to generate a couple of such objects, include scripts, and use scripts to give these objects internal guards.
Another option is some kind of script that randomly assigns guards to all such unguarded objects at the start of the map using search.
Although, of course, this is a workaround, but I don't know how to do it purely with GSC tools.
I also had the idea to make internal guards for, for example, a fort on a hill, like in treasuries. But it will look strange somehow.
Isn't the point about how the generator looks?
The main thing is that the result is "decent". ;)
Then generate several maps using IRMG and compare them with maps created using the built-in RMG.
However, the comparison won't be entirely accurate, as IRMG maps are more suitable for tournament mods.