Download the configuration file credited to your device. 📁 How to Install the XML Config File

: You typically need to create a folder named GCam/Configs8 in your internal storage, paste the .xml file there, and then double-tap the black area around the shutter button in the GCam app to import it.

Here is the ultimate guide to the best config for GCam 8.1 available for free. Why GCam 8.1 Needs a Config File