I think many developers would like to create normal RPG game using GameGuru, me too.
My suggestion is to create RPG module (like 5$) which contains full pack for creating RPGs.
This module would contain:
-Quest system (like kill smb or speak with smb)
-Inventory
-Traders
-Locations (Standart map is too small for great RPG game)
I would like to buy this pack and create my unique medieval RPG.