1999 - 2002 vintage GP 05. It’s listed on the chassis homologation sheet here:
On whether it’s good or not, it somewhat depends on your situation and your plans for it. It was probably as good as any CRG at the time, but if you’re thinking of racing it now, you’ll probably have to put a good amount of money into restoring it. Before you do that, I think I’d get it on a flat table to see if it’s square.