[corna]

microG also reimplements the Google Maps APIs (using OpenStreetMaps) and the Location APIs (with different backends, like Mozilla Location Services or a local offline database). The main Google-based service is Google Cloud Messaging, which is disabled by default in microG.

As you can see, microG doesn't strictly depends on the Google cloud services.

[AlexandrB]

Thanks, this explains things a bit. I think I just misunderstood the scope of this since I'm not in the Android ecosystem.