They are Court cases that have established that the very fact that a connection is being established constitutes a potential collection of IP adresses and needs to be declares under GDPR. (this was specifically about sites using links to Google Fonts on their websites, this was enough to warrant a GDPR declaration that IP are being collected or the sites needed to remove their Font CDNs and supply them locally). Under the same Rule, Companies will need to ddeclare this usage of Go Compiler in their employee GDPR declaritions.