Your Law School email is the first part of your @gwu.edu email, followed by @law.gwu.edu. You use the same password for both email accounts.
It is very important that you are able to check your law school email account. Announcements regarding classes and events are frequently sent there.
To access the Law school's technology learning stack [Canvas, MyLaw, your licensed Zoom account, and more] log into your Law School Email and launch the apps from the Google Apps menu on the top right of your Gmail inbox.