Today that is against code but at least you have a breaker panel. "Circuits" How many wires you have leaving the panel feeding plugs or equipment. 2005 National Electric Code #406.3 (D) 3 b & c States that you can replace a non-grounding type receptacle with a GFCI receptacle if you clearly mark the receptacle (No Equipment Ground). At least this would be better than what you have?