Is a free software reimplementation of Google’s Play Services. It allows applications calling proprietary Google APIs to run on AOSP-based ROMs like Replicant and LineageOS. Acting as a replacement for the non-free (proprietary) Google Apps (GAPPS), it is a powerful tool to reclaim your privacy and freedom while enjoying Android core features.
https://github.com/microg/android_packages_apps_GmsCore/wiki
origin - https://www.pipiscrew.com/?p=15097 microg-gmscore