Apple iCal users (Mac):
Paste this URL in New Calendar Subscription:
https://www.google.com/calendar/ical/srrgk7qgknqojkrvksjd5tnfnc%40group.calendar.google.com/public/basic.ics


Apple iCal users (iPhone, iPad, iPod):
Go to : Settings > Mail, Contacts, Calendar > Add Account > Other> Add Subscribed Calendar> Paste this URL: https://www.google.com/calendar/ical/srrgk7qgknqojkrvksjd5tnfnc%40group.calendar.google.com/public/basic.ics


Google Calendar users: