answer:If it was a one time thing, I’d just change your password. Gmail sent me a notice that someone accessed my account from Toronto, and after changing my password no one has accessed it since. This was a couple of months ago. Granted, they didn’t spam anyone (that I know of), you might want to check the mail they sent out for viruses. If they uploaded a file or anything like that, they might have tried to put in something to allow them access again. If it happens again, I’d both contact Google to let them know and change over to a new account. Obviously, don’t keep anything sensitive in your account.