If you have more than one account and you want to use them all then no then Gmail provide you manage all mail effectively. Now, you can merge all your mail account in your single Gmail account and access all you all your mails in single window. You can add up to five email accounts in your Gmail. So, what are you waiting for if you were looking for this type of help them now it is here, use it. However, if you want to know as how to add email account to your Gmail then you can call to Gmail technical support number and take help form them.