Open up a new blank image and click the Text tool and make some text. After it appears on your paper deselect by pressing Ctrl-D twice.
Now click the text tool again and make the same text as before with the same settings but when you add it do not deselect!
Click the upside down tool and after move the upside down text down a bit like mine.
Now click the gradient button and set your settings as mine.
Do the gradient step twice.