<b>XPosed Module</b>, get https://f-droid.org/packages/de.robv.android.xposed.installer. This module has to be used in combinaton with µg GmsCore to enable Google Cloud Messaging (GCM), location services and more. Install latest GmsCore, FakeStore(or Blankstore) and this module, dial in your phone app *#*#CHECKIN#*#* to register GCM and start using your Gapps-free device as usual. For additional information visit the Github Source code page.