You'll need a Github account that uses the same email address as the one used for your NVIDIA Developer Program membership.
Enter your Github user name at the bottom of the EULA to accept it. Accept EULA
You will receive an invite within the hour.
Note: You only need to sign up once for access to all GameWorks/PhysX source repos on Github.
Many of our technologies are available integrated into Epic's Unreal Engine. You can learn more about these from the following links: