G Suspended 2nd
sus2
0 - 2 - 7Root + major 2nd + perfect 5th
About G Suspended 2nd
Gsus2 replaces the B of a G major chord with an A — G, A, D. On guitar the shape is easier than plain G in some voicings, because the fingers that would fret the third can simply be lifted, and what remains is open and slightly hollow.
The notes
G, A, D. With no third the chord has no mode, and unlike a sus4 it does not lean. It is a colour rather than a gesture.
The same three notes read from D give Dsus4 — the same ambiguity every sus2 chord carries, resolved only by which note the bass is playing.
The chord is also the reason many players discover suspensions at all. Lifting a finger mid-strum on G produces it accidentally, and the sound is pleasant enough that the accident gets kept.
On the fretboard
The usual voicing keeps the low G and D and lets the A ring on the open string or at the second fret of the G string, depending on the shape. Several fingerings exist and none is standard.
In fingerstyle it is often produced accidentally: a G shape with a finger lifted while the thumb keeps the bass moving. That is how most players first encounter it.
Where it shows up
Folk and indie writing in G or D, usually alternating with the plain triad. It also appears in songs that stay on one chord for a long stretch and need internal movement.
Because the guitar’s open strings include G, D and A, this chord is close to the instrument’s natural resonance — one reason it appears in so much acoustic writing without being chosen deliberately.