Gdim7
Gdim7 is the g diminished 7th chord, spelled G – B♭ – D♭ – F♭. perfectly symmetrical stacked minor thirds — the ultimate passing chord, able to resolve almost anywhere.
The keys
G – B♭ – D♭ – F♭
Practise this chord
Plug in your MIDI keyboard and let Coach Tshepho drill you on Gdim7 — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.
Create your free account →What's inside Gdim7
| Note | Interval from root | Degree |
|---|---|---|
| G | Root | 1 |
| B♭ | Minor 3rd | b3 |
| D♭ | Diminished 5th | b5 |
| F♭ | Diminished 7th | bb7 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | G4 – B♭4 – D♭5 – E5 |
| 1st inversion | B♭4 – D♭5 – E5 – G5 |
| 2nd inversion | D♭5 – E5 – G5 – B♭5 |
| 3rd inversion | E5 – G5 – B♭5 – D♭6 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | G2 – E3 |
| Right (colour) | B♭4 – D♭5 |
Where Gdim7 lives
As the ii chord
Gdim7 → C7 → Fmaj7
Minor-family sevenths live on the ii — this is the move they were born for.
Stepwise colour
G → Gdim7 → Am7
Used as a passing colour between neighbouring chords.
Put Gdim7 under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →More G chords
G
Gm
Gdim
Gaug
Gsus2
Gsus4
G6
Gm6
G7
Gmaj7
Gm7
Gm7♭5
Gm(maj7)
G9
Gmaj9
Gm9
Gadd9
G6/9
Gm11
G13
G7♭9
G7♯9
G7♯5Play it over a groove
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