GCPL offers Mango Languages through GALILEO. To access Mango, use this link.
To Mango: http://www.galileo.usg.edu/express?link=ango
You will need to use your library card number as your Username and your PIN as your password.
You can download an app for Mango Languages onto your phone or tablet and use this resource there. However, before you can use the app you will need to register for an account in Mango on a desktop or laptop computer.