This tutorial demonstrates how to configure Outlook 2016 and Outlook 2011 on Macintosh for @colorado.edu Gmail accounts.
You may need to enable IMAP for your account prior to configuration of your email client (https://mail.google.com). To do this:
From the Tools drop-down menu, select Accounts...
Click the + button and select Other Email... (or Email.. for Outlook 2011).
Enter the following for your server settings:
*Note: Be sure to have the Use SSL to connect box checked for each server.
Click the Add Account button.
Your account will be configured and begin syncing mail.
Some users may need to change their app security settings when using non-google and android email programs. While signed into your Gmail account in a browser, open the Google Apps menu, then select My Account.
*Note: You should try to connect your account without changing these settings and change only if the previous steps don't work.
In the Sign-in & Security section, select Connected apps & sites.
Scroll down to the Allow less secure apps section and change the setting to On. You should now be able to connect your account to an email client.