Final answer:
The fourth scale degree of a G-flat major scale is C-flat.
Step-by-step explanation:
The fourth scale degree of a G-flat major scale is C-flat. In a G-flat major scale, the notes are G-flat, A-flat, B-flat, C-flat, D-flat, E-flat, and F. The scale degree refers to the position of a note within a scale, with the tonic (first scale degree) being the main note.
So in a G-flat major scale, the fourth scale degree would be C-flat. This means that C-flat is the fourth note in the scale, counting from G-flat as the first note.