Is it possible to add this feature ?
That's a good question!
Named instances are treated as macros (handled compile-time), meaning that "live" code doesn't know what the values are.
Assuming that GM assigns these in a predictable way (starting from the first room and going layer by layer from top/bottom?), I can probably replicate the algorithm, though there would definitely be caveats if you modify your rooms between starting the game and connecting gmlive-server to it.