I'm using GPS Locker but have no idea what it's doing. Is there any documentation?
Once installed, the application will run as a background service. For example, if you have two applications that require GPS access and switch between them, the connection might get closed. This application enhances the GPS lock and keeps it active until you close the application. It's useful when you're using Maps or any other app that requires GPS to be active at all times.
For additional info, access the following URL: https://play.google.com/store/apps/details?id=com.silentlexx.gpslock