Email, by its very nature, is neither completely private nor secure, regardless of the type of system being used or where the server is located. Any email may be the target of Internet predators, which is why it is important to have a strong password and not to share your confidential information with others. Never provide your password or other personal, secure information via email.
Google offers a number of security features, and also offers tips on keeping your account secure.
Read more about choosing secure passwords on the Computing website.