Free implementation of Play Services. Contribute to microg /GmsCore development by creating an account on GitHub . microG Project A free-as-in-freedom re-implementation of Google's proprietary Android user space apps and libraries. microG is a powerful tool for users who want to minimize their reliance on proprietary Google services while maintaining app functionality. By following this guide, you can understand more about microG installed on your Android device. microG GmsCore is a free software reimplementation of Google's Play Services. It allows applications calling proprietary Google APIs to run on AOSP-based ROMs like LineageOS, acting as a free replacement for the non-free, proprietary Google Play Services (sometimes referred to as the more generic term "GApps").