Check out the instructions below on how to sync the calendar to various devices.

iOS (Iphones)

Launch the Settings app on your iPhone or iPad.

Tap on Mail, Contacts, Calendars.

Tap on Add Account... under the Mail section.

Tap on Other.

Tap on Add Subscribed Calendar under the Other section.

Enter or copy in:
https://calendar.google.com/calendar/ical/campoverdehsband%40gmail.com/public/basic.ics

Tap the Next button.

Tap the Save button.

Android

Open Google Calendar on a computer.

Next to Other Calendars on the left click on the down arrow.

Select Add by URL

Enter or copy in:
https://calendar.google.com/calendar/ical/campoverdehsband%40gmail.com/public/basic.ics

Click Add Calendar.

It will now show up on the left side with other calendars.  It may take up to 12 hours for it to completely refresh and update.