You have a personal Gmail calendar that you would like to see on the same page as your company-related calendar?

Not a problem!

Your OS Calendar is synced with your Google Apps Calendar – so anything you see in your Google calendar, you will also see in the OS Calendar. This includes any Calendars that are ‘shared’ with your OS Google email.

To see your personal calendar in OS, login to your personal calendar and follow the steps in this article:
https://support.google.com/calendar/answer/37082

NOTE: As step 2, enter your company email address (linked to OS). You want to make sure that your email has the highest possible permissions (Make changes AND manage sharing).

Logout and log back into OS. You should now see that calendar in your calendar list!
Check it off in your list as ‘visible’ to see all personal calendar event appear, along with your company-related events.