The Gmail account sign in my account is the same as the home page of Gmail, which has two blank boxes for you to enter your Gmail address or username and Gmail password respectively. You may or may not choose to tick the ‘stay signed in’ box and then click on ‘sign in’ to access your Gmail inbox. If you happen to forget your password or username, you will have to click on the ‘Can’t access your account?’ option in the Gmail account sign in my account page. This will take you a page where it would give you options to choose between ‘I don’t know my password, username, and other sign in problems’. Choose the relevant box and get your problem resolved to login once more.