Gdim Guitar Chord

Gdim is the G diminished chord, a diminished triad. It has three notes: G, B♭ and D♭. It shares nothing with the open G chord: the standard Gdim grip sits at the 5th fret on the top four strings, no barre and no open strings. It is a tension chord, held for a beat or two while the music moves somewhere more stable.

The Ddim grip parked at fret 5: index on the D string root, pinky two frets above the pack on the B string. One shape, any root.

How to play Gdim, step by step

Index finger: 5th fret, D string
Middle finger: 6th fret, G string
Ring finger: 6th fret, high E string
Pinky finger: 8th fret, B string
Strum from the D string down, skipping the two lowest strings.

More ways to play Gdim

There are 2 common Gdim shapes in total: the standard one at the top of the page, plus these, easiest first. You only ever need one. Tap any card to hear it.

Gdim guitar chord diagram, compact, frets 10 to 12, played x 10 11 12 11 x — Compact, frets 10 to 12

Songs that use the Gdim chord

G C Cm Em A7 D7GdimE7 B7
Learn this song(opens a new tab on our partner site)

Common buzzes and how to fix them

The B string note will not ring: The pinky at the 8th fret does the hardest work in this shape. Keep it curved rather than locked straight, and place its tip close behind the fret.
The ring finger note vanishes: When the pinky reaches over to the B string, its underside grazes the high E and mutes the 6th fret note. Lift the pinky's middle knuckle higher.
Stray bass notes under the chord: The low E and A stay out of this voicing. Start the strum on the D string; resting the thumb lightly on the low E makes it foolproof.

What makes it a Gdim

G · B♭ · D♭ 1 ♭3 ♭5

Gdim is a pile of two minor thirds: G up to B♭, then B♭ up to D♭. Compare it with G minor and only the fifth differs, D flattened to D♭. Shrinking that interval removes the frame that normally holds a chord steady, which is why diminished triads sound like motion instead of rest.

The motion points up one fret: G is the leading tone of A♭, so Gdim resolves most naturally to A♭ major, and it works as the ii chord in F minor. Its three notes also sit inside E♭7, so it can sketch that dominant sound in situations where a full seventh chord would crowd the arrangement.

Gdim vs Gm

G minor is G, B♭, D and holds its ground; Gdim keeps the same root and third but drops the fifth to D♭ and immediately wants to leave. Guitarists usually play Gm as a 3rd fret barre, so the barre free Gdim cluster is actually the lighter grip, just higher up the neck. They are never substitutes for each other. Choose Gm when the chart wants a minor chord to sit on; save Gdim for the marked G° moments, where its instability is the whole point.

Gdim chord questions

Is Gdim related to the open G chord?

Only by root note. G major is stable and open; Gdim is a fretted four string cluster with a flat third and flat fifth. The shapes and the sounds have nothing in common.

What is the difference between Gdim and Gdim7?

Gdim is the three note triad: G, B♭, D♭. Gdim7 adds a diminished seventh (E) to make four notes. When charts write Gdim or G° they mean the triad, and this page's shapes are the answer.

What does Gdim resolve to?

A♭ major, one half step up, or A♭ minor. Diminished triads live a fret below their destination.

Is Gdim hard to play?

The two fret pinky reach in the standard shape is the only obstacle, and the compact shape at fret 10 removes it. Neither version needs a barre.

Where would I actually meet Gdim?

Mostly in flat keys like A♭ and F minor, or in jazz style chromatic passages where the bass walks through G on its way up. It is an occasional chord, not an everyday one.