Gb dim7 Guitar Chord | Play, Hear and Practice Interactively
Did you mean G diminished seventh, without the flat? Go to Gdim7.
Gbdim7 is the Gb diminished seventh chord: Gb, Bbb, Dbb and Fbb, built as root, minor third, flat five and diminished seventh. Because the notes repeat every three semitones, the same shape moved up three frets keeps the same four pitches under a new root name.
The listed voicings run from fret 1 up to fret 14. The pitches of Gbdim7 form the vii chord of G harmonic minor, where the same chord carries another spelling. For lead lines, reach for the Gb whole-half scale: it holds each note of the chord, so every chord tone is available. Gbdim7 and F#dim7 are enharmonic twins: two names for the same pitches.
Strum a shape in front of your microphone and the chord player at the top shows which strings ring and which are muted.
Gb diminished 7th guitar chord is also written as Gbdim7, Gb°7 or Gbo7. It is also known as the Gb fully diminished seventh chord.
Gbdim7 Chord Notes and Formula
Gb dim7 chord Notes:
Tones in the Diminished Seventh chord:
Formula: 1 b3 b5 bb7
Same chord, different name: Gbdim7 is also written as F#dim7 (F# diminished seventh).
Gbdim7 Chord Interactive Fretboard
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Gbdim7 Guitar Chord Diagrams
Position 1 Movable
Gb Diminished Seventh Finger Positions
- Mute the B string
- Mute the high E string
- Place your index finger (1) on the fret 4 of the D string
- Place your middle finger (2) on the fret 5 of the low E string
- Place your ring finger (3) on the fret 5 of the G string
- Place your pinky finger (4) on the fret 6 of the A string
Position 2 Movable
Gb Diminished Seventh Finger Positions
- Mute the low E string
- Mute the high E string
- Place your index finger (1) on the fret 11 of the G string
- Place your middle finger (2) on the fret 12 of the A string
- Place your ring finger (3) on the fret 13 of the D string
- Place your pinky finger (4) on the fret 13 of the B string
Position 3 Movable
Gb Diminished Seventh Finger Positions
- Mute the low E string
- Mute the A string
- Place your index finger (1) on the fret 13 of the D string
- Place your middle finger (2) on the fret 13 of the B string
- Place your ring finger (3) on the fret 14 of the G string
- Place your pinky finger (4) on the fret 14 of the high E string
Position 4 Barre Movable
Gb Diminished Seventh Finger Positions
- Mute the A string
- Mute the high E string
- Place your index finger (1) on the fret 1 of the D and B strings at the same time
- Place your middle finger (2) on the fret 2 of the low E string
- Place your ring finger (3) on the fret 2 of the G string
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Chords That Go With Gbdim7
One key where Gbdim7 fits is G minor, where it works as the vii°7 chord, built on the raised 7th of the harmonic minor, so it pulls straight to the tonic. These are the main chords of that key, the ones you will often hear around it:
See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.
More Gb Chords
Want to know how this chord is built? Read diminished and half-diminished chords, or browse all Gb guitar chords.
Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in Gbdim7?
Gbdim7 is spelled Gb, Bbb, Dbb and Fbb. These are the root, minor third, flat fifth and diminished seventh, and they sound like F#, A, C and Eb.
Is Gbdim7 the same as F#dim7?
Yes. Gbdim7 and F#dim7 sound identical. F#dim7 uses simple spellings, while Gbdim7 needs three double flats to keep the letters in order.
Why does Gbdim7 contain three double flats?
Letters run G, B, D, F. A minor third, a flat fifth and a diminished seventh from Gb are Bbb, Dbb and Fbb. They sound like A, C and Eb.
In which key is Gbdim7 a vii chord?
Gbdim7 has the same pitches as the vii chord of G harmonic minor, which spells it F#dim7. The chord is built on the raised seventh degree.
How many Gbdim7 voicings can be played?
There are 4 voicings, 1 of them with a barre and none with an open string. The lowest is at fret 1 and the highest at fret 14.
