Can someone explain what this? Is it a fork of Android with the Google service apps rewritten? Or just the latter?
Could I take an old Android OS and install the alternative Gapps?
Yours, confused.
>Only difference when comparing against LineageOS is that the OpenGApps package is "free".
Rather GApps (google) functionality is re-implemented from scratch and the necessary means (app signature spoofing) to replace GApps with microG is built into this LOS fork
Lineage OS is a fork of Android. This is a fork of Lineage which replaces all the binary blobs to make the Google services work with open source code (with the same or similar behaviour).
I don't know for sure but probably not, the services aren't UserReplaceable.
Only difference when comparing against LineageOS is that the OpenGApps package is "free".