The series, manufactured by Shenzhen Goodix Technology, refers to a family of highly integrated capacitive touch screen controllers. These controllers are the "brains" that process your finger touches and relay them to the device's CPU.
If you are correcting an aftermarket car stereo head unit, you rarely need to mess with raw code. The configuration is stored in the system’s factory layer. Boot up the head unit and navigate to →right arrow System Info . gt9xx 1085x600