The solution was to raise the seventh note to give the harmonic minor - the notes in G harmonic minor are G, A, B b , C, D, Eb, F#. The V-I is now D-Gm or D7-Gm, ... Harley Benton applies ...

Harmonic minors use the relative major key signature and raise the seventh note of the scale. For example, in A harmonic minor there are no sharps or flats other than the raised seventh of G# ...