A whole lot of "legend" about GC. It's entire purpose is accuracy. Whenever I walk into a big advertising agency the designers are on Macs and the room lights are off. Because Mac vid cards sync with Mac monitors on a hardware level, and coloration from room lights is avoided, the Mac screen, in the dark, will give an accurate GC. (No one mentioned you should have your room lights off to get true GC on your screen.)

 The concept of GC was created so that the "golden arches" on one computer was the same color and brightness as on another, and as on a print ad. This is an absolute requirement in the advertising business. With Poser it seems the intention is to get a screen render that mantains the chroma and vibrancy of textures as they were created. This is all GC is -- a type of universal color language. It's nothing else, I promise you. Go research it.