Shared Google Calendars not showing up on iPhone, iPad, and Mac? Here’s the fix! | iMore
Posted by jpluimers on 2016/12/16
If shared Google Calendars do not show on your iPad, iPod, iPhone or Mac, then go to https://www.google.com/calendar/syncselect (sometimes called https://www.google.com/calendar/iphoneselect) and set a tick mark in front of each calendar you want to appear there. Finally, refresh the calendar list on your iOS device and you are set.