On a web browser go to 2fa.gmu.edu. Click 2FA Account Login on the bottom right.
Log in with your Mason NetID and Patriot Pass Password.
Click Request Emergency Bypass Code at the bottom of the page.
You will get a confirmation page that the bypass code was sent to your alternate email address.
Check the alternate email account that you used during enrollment to access your bypass code.
Note: The code is one-time use and must be used within one hour.