@keropi
Glad to hear it worked for you!!
My dad had a GG 486slc 25mhz at one time and sold it we were always going to upgrade it to the 50mhz but never did get around to it. The GG was installed in a 2000 with a hardcard and 50meg hard drive. We also had an 8 bit sound card and an IDE controllor installed with 400meg drive attached to it. The GG ran Doom II and Duke Nukem pretty good too. There was also a Speedstar Pro video card installed in the system ( I think).
I don't know what OS you plan on running on the GG we were able to run Windows 98se on his just fine of course not the fastest around but it ran fine.