Gb Harmonic Major Scale Notes

Degree	Name	Note	Interval
1	Tonic	Gb4	P1
2	Supertonic	Ab4	M2
3	Mediant	Bb4	M3
4	Subdominant	Cb4	P4
5	Dominant	Db5	P5
6	Submediant	Ebb5	m6
7	Leading Tone	F5	M7
8	Octave	Gb5	—

Key Signature

The key of Gb Harmonic Major Scale has 6 flats: B♭, E♭, A♭, D♭, G♭, C♭.

B♭E♭A♭D♭G♭C♭

Parallel key: Gb Minor Scale — same root note, opposite mode. See also the Gb Minor Chord.

Relative key: Eb Minor Scale — shares the same key signature. See also the Eb Minor Chord.

These are the diatonic triads built on each degree of the Gb Harmonic Major Scale:

Degree	Numeral	Chord	Quality
1	I	Gb Major	Major
2	ii	Ab Minor	Minor
3	iii	Bb Minor	Minor
4	IV	B Major	Major
5	V	Db Major	Major
6	vi	Eb Minor	Minor
7	vii°	F Diminished	Diminished