Sync Multiple Calendars with iOS and the Apple Calendar app

Enable additional calendars in Google

From a computer:

1. Navigate to https://calendar.google.com/calendar/syncselect in your Chrome Profile. If you are prompted to sign in, enter your G Suite credentials.
2. You will see a list of all your calendars.
3. Select the checkboxes next to the calendars you wish to sync with your Apple device.
4. Scroll to the bottom of the page and click Save.

From your mobile device:

1. Navigate to https://m.google.com/sync/settings/iconfig/ from your preferred mobile browser. Make sure you are logged in with the correct G Suite account on your device.
2. You will see a list of all your calendars.
3. Select the checkboxes next to the calendars you wish to sync with your Apple device.
4. Scroll to the bottom of the page and click Save.

Enable the calendars in the Apple Calendar app

To view multiple calendars, tap Calendars at the bottom of the screen, then select the calendars you want to view.