Very good article.

The security risks associated with the GAIA ID are mainly related to the potential exposure of personal and sensitive data that Google users may have stored or shared on various Google services and products, such as Gmail, Google Drive, Google Photos, Google Maps, and more. The GAIA ID is a unique identifier for Google users that is used to access these services and products, and it can also be used to manage the access control and permissions for Google Issue Tracker, which is a tool for tracking bugs and feature requests for Google projects.