No, it's a diminished octave. There is no such thing as a minor octave.
F sharp and G flat are the same. F sharp is a half octave up from a F and a G flat is a half octave lower than a G.
D flat major, or b flat minor. The flats are B, E, A, D and G, in that order.
G minor is G, B-flat, and D.
For b flat major: b flat, c, d, e flat, f, g, a, b flat. For b flat natural minor: b flat, c, d flat, e flat, f, g flat, a flat, b flat. For b flat harmonic minor: b flat, c, d flat, e flat, f, g flat, a, b flat. For b flat melodic minor, ascending: b flat, c, d flat, e flat, f, g, a, b flat. (Melodic minor descending is the same as the natural minor.)
G diminished is G, B, and D-flat. G minor diminished is G, B-flat, and D-flat.
F sharp and G flat are the same. F sharp is a half octave up from a F and a G flat is a half octave lower than a G.
D flat major, or b flat minor. The flats are B, E, A, D and G, in that order.
For G Harmonic Minor: G, A, B-flat, C, D, E-flat and F-sharp. For G Melodic Minor: [Ascending] G, A, B-flat, C, D, E and F-sharp. [Descending] G, F, E-flat, D, C, B-flat and A.
G minor is G, B-flat, and D.
G flat, A flat, B flat flat, C flat, D flat, E flat, F natural and G flat.
G Major : G A B C D E F# G F# E D C B A (ONE OCTAVE) G Minor (harmonic) : G A Bb C D Eb F G F Eb D C Bb A G (ONE OCTAVE) G Minor (melodic) : G A B C D E F# G F Eb D C B A G (ONE OCTAVE)
G Major : G A B C D E F# G F# E D C B A (ONE OCTAVE) G Minor (harmonic) : G A Bb C D Eb F G F Eb D C Bb A G (ONE OCTAVE) G Minor (melodic) : G A B C D E F# G F Eb D C B A G (ONE OCTAVE)
G natural minor scale G, A, B flat, C, D, E flat, F, G G harmonic minor scale (raised 7th) G, A, B flat, C, D, E flat, F sharp, G G melodic minor scale (traditional)(raised 6th and 7th going up, dropped on way down( G, A, B flat, C, D, E flat, F sharp, G (Ascending) G, A, B flat, C, D, E flat, F, G (Descending) G melodic minor scale (Jazz) (Raised 6th and 7th going up and down) G, A, B flat, C, D, E flat, F sharp, G (Ascending)
For b flat major: b flat, c, d, e flat, f, g, a, b flat. For b flat natural minor: b flat, c, d flat, e flat, f, g flat, a flat, b flat. For b flat harmonic minor: b flat, c, d flat, e flat, f, g flat, a, b flat. For b flat melodic minor, ascending: b flat, c, d flat, e flat, f, g, a, b flat. (Melodic minor descending is the same as the natural minor.)
B-flat up to G is a major 6th. Or, B-flat down to G is a minor 3rd.
B-flat can be found in the minor scales of D, G, C, F, B-flat, E-flat, and A-flat (and the obscure but possible D-flat minor).
G diminished is G, B, and D-flat. G minor diminished is G, B-flat, and D-flat.