There are 2 firmwares, one is the normal firmware, one is the BT firmware.

1) BT firmware:

    https://gulikit.com/newsinfo/1050207.html

    i, Turn off the controller, connect it to your PC(Windows system) via a USB-C data cable.

    ii, Press the  ’Gear + A buttons’ together to turn it into BT updating mode.

    iii, Download the zip file on the link, then unzip it, and turn on the exe file.

    Click the Update Firmware button.

    Note: If the Update Firmware button is gray, it means that either the controller has not entered Bluetooth upgrade mode or it already has the latest firmware.

2) Normal firmware

    https://gulikit.com/newsinfo/1050207.html

    i, Turn off the controller, connect it to your PC(Windows system) via a USB-C data cable.

    ii, Press and hold the ‘APG button(double-square icon button) + A buttons’, a disk named ‘GuliKit’ will appear on your PC.

    iii, Download the zip file on the link, then unzip it, copy the ‘****.bin ’file into the ‘GuliKit’ disk. (Do not drag it directly from the zip file)

    iv, After the upgrade is successful, the disk will automatically shut down and it can now be used normally with your controller.

You may have accidentally enabled Turbo on a button, press the  'Gear+Minus buttons’ combination to reset the controller.

You may have accidentally turned on the aim assist feature, press the 'Gear+Minus button’ combination to reset the controller.

This indicates that your controller needs to calibrate the joysticks and triggers.

1) Press the 'L, R, A, Left of Dpad button’ combination to enter the calibration mode.

2) Turn the Left and Right joysticks clockwise for 2-3 full circles.

3) The two joystick rings automatically turn green, indicating that the calibration is successful and completed.

You can set it up online.

https://test.gulikit.com/?language=1&time=1751530525820