As per the summary, even configuring a GNOME online account, and I can see it on Nautilus, the Google calendar doesn't appear on GNOME calendar.
I have the same issue, but it also doesn't show up in gnome-shell calendar, so it's probably evolution-data-server bug.
Count me in. Google calendar events don't appear in gnome-calendar after adding a Google account in gnome-online-accounts. Email and contacts are fetched successfully inside Evolution, but it's not the case with calendar events and tasks.
Upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=794879
This has been fixed upstream: https://git.gnome.org/browse/evolution-data-server/commit/?id=3d9c3a8b5
*** Bug 1566626 has been marked as a duplicate of this bug. ***
It works now with evolution-data-server-3.28.1-2.fc28.x86_64