Can PP gauges be added to a base model GT, was not sure if the plugs are already there behind the panel ?

 

My buddy who builds these in Flat Rock says no....there are different wiring harnesses for PP or non PP

 

Experience from retrofitting pretty much everything to my 2012, I would say doable.

But since the dash harness is not the same, then you will need to get the wiring diagrams, connectors and pins and route the wires yourself.