GVWR, Gross Vehicle Weight Rating...of the TV and what it is rated to carry onto the pavement via its tires. This is NOT the MTWR or max trailer it is rated to tow
GCWR, Gross
COMBINED
Weight Rating...what the TV, trailer and anything in/on/etc them both are rated to carry onto the pavement via the tires
MTWR, Max Tow Weight Rating...what the TV is rated to tow, but this is NOT always the truck most people can purchase. Mostly for marketing/sales purposes and to get that number...many times used a low end model with little to no options to derive the MTWR