My electrical service entrance is on the opposite side of the house from the municipal water supply's copper pipe, so the panel ground wire runs about 30-40 feet through the house before it's bonded to the city copper.
Is there any problem running a 12-2 wire (120V + neutral, panel is 240V split) along the same path as the panel ground (same stud/joist holes, staples, etc.)? Would inductance from the circuit cause any problems with GFCI receptacles in the house?