When I click on the "Forgotten or Expired Password" link on the Patriot Pass Management site, I'm asked to enter my G Number Claim Code, but I don't know what a Claim Code is?

The Claim Code is a six-to-nine-character long code that you established with the ITS Support Center or administering department. You can use it, along with a G Number on the Password Management Site to get your NetID and Patriot Pass Password.