[rebolek]

I think that G was changed to "general", so now it's "general processing unit".

[rpdillon]

This doesn't seem to be true at all. It's a highly specialized chip for doing highly parallel operations. There's nothing general about it.

I looked around briefly and could find no evidence that it's been renamed. Do you have a source?

[fouc]

CPU is already the general (computing) processing unit so that wouldn't make sense