This document explains how to disconnect from the Palo Alto GlobalProtect client on Android devices.
How to Disconnect
To disconnect from the GlobalProtect VPN, simply open the GlobalProtect app and tap on the green shield icon above "CONNECTED".
When GlobalProtect is disconnected, the entire app screen will appear gray with the words "TAP TO CONNECT" in the center of the screen.
To completely remove GlobalProtect from your device, follow the steps for uninstalling, found here: WiscVPN - Uninstalling the Palo Alto GlobalProtect Client (Android)