Does anyone know if the GTR Pro or black series front bumper fits the 2020 GT C with no changes other then direct bolt on?

The fenders on the R are wider than a GTC so there is a chance none of it fits. That said, if it does, the only thing that swaps will be the bumper cover and the upper grill. You will need all of the internal bracing and lower grills and chin - it'll break the bank for sure.

R is 2 inches wider in front.

agree - just not sure of that hugs back into a standard GTR bumper cover. Its been so long I forget how to access the STAR link that allows customers access to schematics and part numbers by VIN...I need to find it again - it was GOLD.