The Wii U gamepad is already supported as a controller when using WiiVC injection on Wii U, but it is not supported as a gyro controller for gyro emulation. If this is not due to technical limitations, it would be really awesome if gyro support could be added to the Wii U gamepad as well.
This functionality is not exposed by https://github.com/FIX94/libwiidrc, so you should file an issue request there. Otherwise, I can't do anything about it.
The Wii U gamepad is already supported as a controller when using WiiVC injection on Wii U, but it is not supported as a gyro controller for gyro emulation. If this is not due to technical limitations, it would be really awesome if gyro support could be added to the Wii U gamepad as well.