What is GUI???
Graphic user interface. Or something like that.
Paradox
google is your friend.
When you want to write a Python script that needs to interact with the user in any way, for parameters and such, then you will discover all about “GUI.”
Save yourself a lot of trouble and go find and download some examples. Study everything that ships with Blender before attempting to write anything new. Cabbage whatever you can.
wow, you ever heard of google?
no really… you pronounce GUI as gooey! who would have thought of that?
the GUI is just what you see and how you interact with it.