There is disclosed a method and system for generating documentation for a graphical user interface (GUI) usage scenario. There is also disclosed a method and system for assembling a GUI script from a plurality of pre-scripted parts. In an embodiment, shadow objects are created to listen to and report activities of each GUI object of interest during a GUI usage session. The shadow objects may listen to shadowed GUI object activities during playback of the GUI script, or during a live GUI usage session. GUI object activities reported by the shadow objects are identified and converted into narrative language statements, using a pre-determined conversion list, to create human-readable documentation.