A breached Gmail account is a much bigger prize than just the e-mail account it is attached to. Attacks originating from China have breached Google Gmail accounts, including those of senior US government officials. China denies any state-sponsored involvement in the attacks, and the FBI is investigating. With the Gmail username and password in hand, an attacker can log in to the victim’s Google Calendar and find out where they’re going to be, and when, based on the events and appointments it contains.”]
Source: https://www.csoonline.com/article/2128638/more-than-e-mail-at-stake-in-google-gmail-attack.html