We found no breach notice sent to Gmail users, because Google says Gmail was not breached. Google’s public statement on X is the closest thing to an official notice. The Register and BleepingComputer both quote it.
What Google has said officially:
October 27, 2025: Google said reports of a Gmail security breach impacting millions of users are false and that Gmail's defenses remain strong.
Salesforce incident: Google did confirm a separate breach of a corporate Salesforce database. Contact details of affected prospects were limited to business information, per Google.
No customer notice for Gmail: We found no notice letter, state attorney general filing or claim form tied to a Gmail breach.