If you want to know the method of sign in your Gmail account then follows these steps-
1. Go to the Google’s website at https://www.google.com/.
2. Tab on the “Sign in” option at the top right corner of the Google Home page.
3. Type your Gmail username and click on the “Next” button.
4. Enter your Password into the box and click on “Sign In” button.You will now be logged into your Gmail account.
Watch This Video How to sign in into your Gmail account