Hi there and welcome
When you are at Gmail, click on the Circle in the top right then click Sign Out
Then click on Add Account
Then enter in your Gmail email address and then your password ***** it can then sign into your account.
If you have any problems or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.