Instructions to add the team calendars to an iOS device:
If you have already added the calendar(s) to your google calendar, Go to https://www.google.com/calendar/syncselect on your iOS device, sign in to your google account and select the calendars you want to sync.
If you want to subscribe directly to the calendar without going through google: On your iOS device, go to settings, mail/contacts/calendars, add account, other, add subscribed calendar and then paste in one of the following URLs (depending on which calendar you're adding), click next and then save. Repeat to add additional calendars.