1.    If you haven’t already done so, you’ll need to install the Gmail App

2.   Locate it on your smartphone, tablet or other device and open the Gmail App

3.   If you already have other accounts setup, the App will open in the last inbox you were in, click on the Hamburger menu

4.   Then click on the down arrow, right of screen

5.   Select the  +  Add Account option, bottom of screen

6.   Select the Google option

7.   Enter the Email address account to be added, and tap NEXT  > bottom right hand corner

8.   Enter the Email account password, and tap NEXT  > bottom right hand corner

9.   Tap ACCEPT  > bottom right hand corner

10.   Your newly added account will now appear in your list of Email boxes to select from.