Don't let that quote misguide you. AppGameKit is
excellent for PC/Mac game development. However it also includes large sets of optional commands to utilize mobile sensors for touch, acceleration, GPS etc. to make porting between them much easier.
Many users have developed free and commercial desktop products with AppGameKit including some now released on Steam (
Echoes+,
Rush to Adventure,
Painter's Playground,
Santa's Workshop and others). I myself won the $10k grand prize in one of Intel's game development challenges where I used AppGameKit exclusively to create a simple desktop game some years back.
The real meaning of that excerpt is that GameGuru is built using a completely incompatible framework than AGK2 (DirectX vs. OpenGL). So Game Guru's content does not easily translate into something usable in AppGameKit, and is instead built
exclusively for Windows. Meanwhile since AGK2 uses OpenGL/WebGL/OpenGL ES technologies it can develop and run games and apps equally well on mobile and PC.
The GameGuru Loader (which is a third party utility) attempts to bridge the gap by doing all the heavy lifting to convert GameGuru content into something runnable via AppGameKit (OpenGL). The developer has in many ways improved and made more efficeint GameGuru content
through AppGameKit and has proven it is perfectly capable of running such content.
My own thoughts from the very beginning with GameGuru/FPSC:Reloaded was that it should had been developed using OpenGL/AGK as the underlying engine. This would've allowed both that product and AppGameKit to rapidly evolve as new features to support advanced 3D opperations would be added. But the decision was made to instead develop it using the aged DirectX 9 DBPro platform, which is Windows-only. The original reasoning as I recall was that this would be the fastest route to getting the product completed since the original FPSC was also built from DBP. But six years later and several major rewrites to GG due to the sluggish and obsolete portions of DBP/DirectX I'm not convinced that was a wise decision and it effectively ruled out portability for GG except using third party tools like GameGuru Loader when possible.