You need to use google calendar api to sync back to google. To sync from google calendar to anything, you can use secret address ical format that you can obtain in calendar settings. Go to calendar -> settings -> settings of my calendars -> click on calendar you want and you will see “secret address ical format”. you can use this url in any modern calendar software
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you need to use google calendar api to sync back from yours but to sync from google calendar to you just use secret address ical format that you can obtain in calendar settings. Go to calendar -> settings -> settings of my calendars -> click on calendar you want and you will see secret address ical format. you can use this url most likely in any modern calendar software