Curb weight (weight of the car without anything in it) is not what is used for Section 179. The GVWR, which is curb weight plus maximum payload, is the value that is important for 179.
GGT has a curb weight of 6,072 lbs and a GVWR of 7,321 lbs. About 1,250 lbs is what the GGT can carry. I would...