graphical user interface (GUI), a computer program that enables a person to communicate with a computer through the use of symbols, visual metaphors, and pointing devices.

GUI (Graphical User Interface) is the UI screens you see in any application. GUI concept started with Windows screens that has controls such as buttons and text boxes. Now, any user interfaces (Web, mobile, windows) you see are all GUI.

gui is know as graphical user interface

The GUI, graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based UIs, typed command labels or text navigation