GUI text vs ui text

Are there any major differences between GUI text and ui text?

GUI is legacy UI.

I talked to my uncle, who is a computer mastermind, and here is his answer:

A GUI is a graphic user interface,
like what you see on Mac or Windows
and has all the pictures and fancy
function icons. A UI, on the other
hand, is a text-based user interface,
like what was used in the old Unix and
early Linux systems.

So, if you are just using text in your game, it is UI. If you have a picture that you click on (Example: Instagram logo), it is a GUI. It is also GUI if it is a background image, like the game logo on the start screen.