it's a separate piece of hardware on the ECU nothing to do with Tunerstudio.
It needs me to have a car/ecu and my software developer in the same place at the same time to finalise the correlation between coolant temp and PWM to operate the gauge, I've jsut not been able to do it yet, time/diaries, but the hardware is onboard so when I've done it, I'll just be able to sort it on the few boards that are out there