G♭ Major
Key Signature
| Property | Value |
|---|---|
| Tonic | G♭ |
| Mode | Major |
| Accidentals | 6 flats |
| Key Signature Notes | B♭, E♭, A♭, D♭, G♭, C♭ |
G♭ major has six flats and is enharmonically equivalent to F♯ major. It is chosen when a flat key is preferred for readability in notation and arranging.
Diatonic Chords
The seven diatonic chords of G♭ Major — each built on a scale degree using only the notes of the key signature:
| Degree | Roman Numeral | Chord Type | Chord |
|---|---|---|---|
| 1 | I | Major | G♭ Major |
| 2 | ii | Minor | A♭ Minor |
| 3 | iii | Minor | B♭ Minor |
| 4 | IV | Major | C♭ Major |
| 5 | V | Major | D♭ Major |
| 6 | vi | Minor | E♭ Minor |
| 7 | vii° | Diminished | F Diminished |
Related Keys
- Relative Minor
- E♭ Minor — shares the same key signature.
- Parallel Minor
- F Sharp Minor — same tonic, different key signature.
See all key relationships on the Circle of Fifths.
Scales in G♭ Major
Common scales built from the G♭ tonic:
Transposing Instrument Context
B♭ instruments (trumpet, clarinet, tenor saxophone) read in A♭ major to sound G♭ Major. E♭ instruments (alto saxophone, E♭ clarinet) read in E♭ major to sound G♭ Major. Flat-key signatures are particularly comfortable for woodwind instruments designed around B♭ and E♭ transpositions.