Search on the "Google play store" "Gmail", install the app and then open it. Then select "Personal (IMAP/POP)" and tap "Next".
Write your email address and tap on "Manual setup".
(Click on the images to zoom)
Select "Personal (IMAP)" and tap "Next".
Insert your password and tap "Next".
Fill the spaces with your data, as in the example, and tap "Next".
Fill the spaces as in the example with your data and tap "Next".
If all went good, you should see a window like this.