Learn › G Half Diminished Chord on Guitar (Gm7b5)
New Released in April 2026
G Half Diminished Chord on Guitar (Gm7b5)
G half diminished (Gm7b5) on the guitar: press the strings shown below; some strings ring open. Strum all six strings and you hear G, Bb, Db, F. Below: the diagram, which finger goes where, a second shape and the chords that go with it.
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- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
Gm7b5 chord diagram
Fingers and frets
- Middle: 6th string (low E), fret 3
- Ring: 4th string (D), fret 3
- Little: 3rd string (G), fret 3
- Index: 2nd string (B), fret 2
Which strings to strum
3x332x: × = do not play, 0 = open string.
Gm7b5 string by string
| 6th string (low E) | fret 3: G |
|---|---|
| 4th string (D) | fret 3: F |
| 3rd string (G) | fret 3: Bb |
| 2nd string (B) | fret 2: Db |
From Gdim to Gm7b5: 4th string (D): fret 5 → fret 3.
Slide this shape along the neck: fret 1 = Fm7b5, fret 2 = F#m7b5, fret 4 = Abm7b5, fret 5 = Am7b5.
Where Gm7b5 is used
Gm7b5 leads to C7 and then home: it is the ii chord of a minor key, as in Gm7b5 → C7 → Fm.
Make Gm7b5 automatic
Strum Gm7b5 near the microphone when it comes up in ChordRunner: the game checks all four notes, G, Bb, Db, F, and moves on. MIDI keyboard or microphone, both work. MIDI keyboard or microphone, both work.
Play the demoCommon questions
What notes are in the Gm7b5 guitar chord?
G half diminished has three notes: G, Bb, Db, F. On the guitar some of them are doubled on different strings, so all six (or five) strings sound like one chord.
What is the difference between Gm7b5 and Gdim on guitar?
Gm7b5 adds one note to Gdim: F, on top of G Bb Db. From Gdim to Gm7b5: 4th string (D): fret 5 → fret 3.
Which fingers do I use for Gm7b5?
Middle finger: 6th string (low E), fret 3, ring finger: 4th string (D), fret 3, little finger: 3rd string (G), fret 3, index finger: 2nd string (B), fret 2.
Does ChordRunner hear Gm7b5 on guitar?
Yes. Strum it near the phone or computer microphone and the game checks the four notes G, Bb, Db, F. A USB MIDI keyboard works too.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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