First of all, you will need to download the GCam XML Config file on your device.
Either you can select ‘Save as’ the XML file by right-clicking on it after opening the XML file on your browser or you can visit the XML link on your device browser and choose menu icon > Tap on Share > Choose File Manager to copy/paste the file on your device storage.
Now, go to the File Manager app and create a new folder called GCam.
Open the GCam folder > Create another folder called Configs7.
Copy and paste the downloaded GCam XML Config file inside the configs7 folder.
Steps to Install Gcam APK on Moto G8 and G Fast
You can download the Hypercam Raizen APK file from the link above on your device.
Now, head over to the File Manager app > Tap on the downloaded Google Camera APK file.
It may ask you to enable the Unknown Sources for the first time.
Just turn it on and tap on the GCam APK file again.
Tap on Install and wait for it.
Next, launch the GCam app on your phone.
Double-tap on the blank area beside the camera shutter button.
Select the copied XML Config file and a pop-up will appear.