As Landman has said above at this moment in time GameGuru is pretty much geared towards FPS games, although with skill in scripting you should be able to add RPG elements too. TGC have plans to expand the capabilities of GameGuru so that it's capable of producing any type of game that uses a 3D game engine, maybe even 2D games if there's enough demand for it..?
This is an Early Access version so it's still in development and if the original FPS Creator is anything to go by they'll continue working on GameGuru for years to come.

"This you have to understand. There's only one way to hurt a man who's lost everything. Give him back something broken."
Thomas Covenant, Unbeliever