After you are done with www.Gmail.com Sign Up, you can go for Gmail Login by heading over to https //www.Gmail.com or https://Mail.Google.com/Mail/ or https://Mail.Google.com or https://Mail.Google.com/mail/x/. For Gmail Login you have to provide your Gmail username and password. In case if you forgot your password, you can reset your password by confirming your identity. After you are done with your work make sure that you do not forget the Gmail Sign Out. Not signing out of Gmail on public computers and just closing the browser will open the doors for others to access your Gmail account.