With the Private Google Calendars plugin you can display private and public Google calendars on your WordPress website.
Note that the most recent version of this plugin (starting at 20220206) is driven by FullCalendar 5 while the previous versions were driven by FullCalendar 4. The latest versions will keep supporting FullCalendar 4 for some time but this will be deprecated in the future.
See https://michielvaneerd.github.io/privategooglecalendars/ for information about usage. Note that some examples are for FullCalendar 4 only.
Sub pages (for plugin version 20220206 and onward - I'll add more examples later on):