Just a note:
Do not to add the iCal .ics *file* to Apple calendar app or other calendar that use iCal ics, because the file that download won't be updated.
You should add the *URL* of this file/feed by subscribing to it inside your favorite app.
Here is the URL feed (same as above under "iCal version"). Copy / Paste it instead of just clicking it:
https://www.google.com/calendar/ical/3raqd043qqvq4c623je046fano%40group.calendar.google.com/public/basic.ics
It's a common mistake because browser by default dowload the feed as a static .ics file.
Just for the anecdote, even amongst the tech-savvy startupers at Le Camping where we used a similar feed to keep the 12 teams updated, more than a few Apple iCal users (an app with good ics support) added the static file instead of subscribing to the URL feed!