Soon after creating your Gmail Account from http://www.gmail.com or http://www.googlemail.com, you can login to your account to access Gmail. To sign in to Gmail.com you have to visit www.gmail.com and enter your details, Username and Password, in the sign in box on the right of the page. If you had entered the correct username and password, you will be landing on your Gmail email page.
Once you are in your Gmail page, you can read your mails or compose and send mail to your friends and family. If you have trouble in sign in, you can click on the link “Can’t access your account?” to get help on how to login to your account.