Gbdim Guitar Chord | Play, Hear and Practice Interactively
What is in Gbdim, the Gb diminished chord? The notes are Gb, Bbb and Dbb. Diminished triads often work as passing chords between two more stable chords, connecting them with a step of tension. The lowest voicing starts at fret 2 and the highest reaches fret 11.
Gbdim fits inside the Gb Locrian scale: each of its notes is a member of that scale. Before moving on, run a mic check in the player at the top of the page to confirm which strings ring. Bbb and Dbb are theoretical notes, which is why this sound is also written as F#dim, with the same pitches under other letter names.
Gb diminished guitar chord is also written as Gbdim, Gb°, Gbm(b5) or Gbmb5.
Gbdim Chord Notes and Formula
Notes in the Gb dim chord:
Tones of the Diminished chord:
Formula: 1 b3 b5
Same chord, different name: Gbdim is also written as F#dim (F# diminished).
Gb Dim Chord Interactive Fretboard
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Gb Dim Guitar Chord Diagrams
Position 1 Barre Movable
Finger Positions
- Mute the B string
- Mute the high E string
- Place your index finger (1) on the fret 2 of the low E and G strings at the same time
- Place your middle finger (2) on the fret 3 of the A string
- Place your ring finger (3) on the fret 4 of the D string
Position 2 Movable
Finger Positions
- Mute the low E string
- Mute the A 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 G string
- Place your ring finger (3) on the fret 5 of the high E string
- Place your pinky finger (4) on the fret 7 of the B string
Position 3 Movable
Finger Positions
- Mute the low E string
- Mute the high E string
- Place your index finger (1) on the fret 9 of the A string
- Place your middle finger (2) on the fret 10 of the D string
- Place your ring finger (3) on the fret 11 of the G string
- Place your pinky finger (4) on the fret 10 of the B string
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Chords That Go With Gbdim
One key where Gbdim fits is G major, where it works as the vii chord. 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 Gbdim?
Gbdim is spelled Gb, Bbb and Dbb: root, minor third and flat fifth. On the keyboard these sound as F#, A and C, three notes a minor third apart.
Is Gbdim the same chord as F#dim?
Yes, they share the same pitches and sound identical. F#dim is the easier spelling, F#, A and C, while Gbdim needs two double flats.
Why does Gbdim need two double flats?
Chord letters run in thirds: G, B, D. A minor third up from Gb is Bbb, and a flat fifth is Dbb. Both double flats are the correct spelling, even though they sound like A and C.
What is the Gb diminished chord's vii function?
Gbdim has the same pitches as the vii chord of G major. That key writes it as F#dim, the diminished triad on its seventh degree.
How many Gbdim voicings does a guitar have?
There are 3 voicings, and 1 of them uses a barre. No voicing uses an open string. They run from fret 2 to fret 11.
