You will be able to plug your gtir ecu into the highport DE harness if thats what your asking.
If the car has already been wired up (or is stock) for a highport, then simply use the highport harness on the GTiR engine (with the appropriate modification eg, resisters and tps wire swap) and use gtir ecu.
If the car has already been wired up (or is stock) for a highport, then simply use the highport harness on the GTiR engine (with the appropriate modification eg, resisters and tps wire swap) and use gtir ecu.