Thanks for this work!
I am however not able to get any events. I followed the wiki, no errors. In domoticz I see both Gcal status and Gcal switch. The authentification went fine.
Here is the part after running. This is for a calendar with the seasons of the year. (which is already included in my google calendar)
Retrip adjacent events with the same name [y/N] y
Created Domoticz virtual switch device (idx) : 27
Created Domoticz virtual switch device (idx) : 28
Creating a new Google Calendar state entry for calendar with address: 0ugfnhd1ui firstname.lastname@example.org
Creating a new GCal state entry for calendar with UUID: _fqwbkrQS3yzTyS3Unjkgg
Syncing Calendar data with Google: email@example.com
. Last fetched: 14400 minutes ago. Interval: 180
No events found.
Google Calendar states changed... Needs to save
GCal Calendar states changed... Needs to save
Think i got it to work: in the wiki it states that domoticz basic auth is needed but this did not work. After removing user and password for the website it started to work