If you have an FX-GA for either PC-9801 or Win (or was it DOS?), can you play normal PC-FX games as well? Not going to get one, but curious.
While there are a couple discs which come with the GA which won't run on the PC-FX console, the primary purpose of the FX-GA is playing regular PC-FX games.
The most disappointing thing about the GA is how unintegrated it is with the PC. All it really uses the PC for is the CD-ROM drive. Other than that, it's pretty much an entire console that slides into your PCI slot. Power, controller, video output are all handled through ports on the GA directly - can't output on your PC monitor, use PC game controller, keyboard, etc.