For those who have linked Gmail and Drive to the personal version of Gemini, it is recommended to read Google's help documentation.
Some developers have done a test: after opening the associated application and asking "Is my network service fee too expensive?" Gemini will check the operator's mail in the mailbox on its own, even if the user does not ask it to check the mailbox. Content returned includes a bill summary, name and account information, email snippets, and sometimes a fairly complete email body.
This itself is considered functional design. What should be more concerning is a paragraph in the help document: Some related application data processed by Gemini will be checked by manual auditors, including trained service provider personnel, that is, outsourced audits.
What may be reviewed may include summaries, excerpts, and inferences from emails and documents, as well as conversations between you and Gemini. The document also states that if the email is short or particularly relevant to the question, the so-called summary is sometimes the email itself.
Google said that it will try to reduce personal information before reviewing, such as disconnecting interactions from accounts, but it also admitted that it cannot be 100%, so it reminds users to be cautious about connecting applications that contain confidential information.
In addition, when "Save Activity" is turned on, the data may also be used to train the model. If you don’t want to be used for training, you can turn off saving in the Gemini application activity.
Work emails, contracts, and physical examination reports are stored in your Google account. It is best to think carefully before linking them.