Answer:
The notes of the G major scale are G, A, B, C, D, E, and F♯.
So... the note not included in the G major scale is (flats and sharps excluded): F. Remember that this note is not included in the G major scale, while excluding all flats and sharps! So basically all flats and sharps aren't in the G major scale EXCEPT F#. But. the regular note NOT included is F.
Step-by-step explanation:
G major (or the key of G) is a major scale based on G, with the pitches G, A, B, C, D, E, and F♯. Its key signature has one sharp, F♯.....Hope that makes sense.