Calendar

We recommend using the Google Calendar App for mobile devices. Download this from the App store for iPhone or it comes pre-installed on Android devices. Follow this step after adding the Gmail account to your mobile device.

https://www.google.com/calendar/about/

Open the Google Calendar app. It will have a checkbox to add your orlandusd.net account since you already added the mail account.

Turn the checkbox on and the calendar will sync.

If you elect to not use the Gmail and Calendar apps, you will have already added the calendar using the default iPhone mail and calendar app.