You can download the full version of GDPS Editor 2.2 from several sources. Here are some options:
Malavida:
This website offers the Android GDPS Editor application, allowing users to make and edit levels within Geometry Dash SubZero. It provides a user-friendly interface for beginners and includes options like changing the game’s physics and adding music to your own.
AndroidProg:
This system includes The GDPS Editor 2.2.1.4 APK for free. Users can create their levels and modify different gameplay elements, including difficulty, object placement, etc.
APKPure:
Download GDPS Editor 2.2.12 via APKPure, which includes minor bug fixes and enhancements. The version is compatible with Android 4.4 or greater.
APKHiHe:
The site provides The GDPS Editor 2.2 APK, allowing users to edit and create their Geometry Dash levels easily.
Ensure you enable “Unknown sources” in your device settings to install APK files from these sources.