The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped.
Gsus2sus4 is G, A, C and D — Gsus4 with the second added underneath the fourth.
It sounds ringing and deliberately ambiguous. Read another way it is a stack of fourths, which is why it works as a pad rather than as a chord that resolves.

| G | A | C | D |
|---|---|---|---|
| 1 | 2 | 4 | 5 |
Texture more than function — still no third.
Also written Gsus2/4 or G suspended 2nd and 4th. The same chord either way; which spelling you meet depends on who wrote the chart.
The same operation one voice further down: the third voice from the top falls an octave and becomes the bass.
That leaves a bigger hole under the top three notes, so a string gets skipped: the muted string in the middle is the shape, not a mistake.
Gsus2sus4 has 10 of them, on strings 6-4-3-2 and strings 5-3-2-1, from open position up to the 14th — every inversion the chord has: G in the bass, A in the bass, C in the bass and D in the bass. The one to learn first is the G shape at the nut.
5 of them sit on strings 6-4-3-2, so you can run the inversions up one set without changing strings — which is the whole reason to learn them as a family rather than as separate grips.
Start with 300213 — no barre and 2 open strings. 3 of the 7 shapes here sit in open position. 3 of the 7 need a barre. Together they cover the neck from the 1st fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 300213 | open position | G, root position | G | 2 open strings |
| 33021x | open position | G, root position | C | 1 open string |
| 33023x | open position | G, root position | D | barred |
| 335535 | 3rd fret | G, root position | A | barred |
| x-10-7-7-8-8 | 7th fret | G, root position | C | all fretted |
| x-10-10-12-10-10 | 10th fret | G, root position | D | barred |
| 15-15-12-14-x-x | 12th fret | G, root position | A | all fretted |
The same notes rebuilt from scratch give 15 drop 2 and 3 open string voicings, each on its own page.
In which keys. Every note of Gsus2sus4 belongs to C major (the V), D minor (the iv), E minor (the ♭III), F major (the ii), G major (the I), G minor (the i), A minor (the ♭VII) and Bb major (the vi).
Every note of Gsus2sus4 is in G major, G mixolydian, G dorian, G natural minor and G harmonic minor.
Change one note of Gsus2sus4 and you have Gsus2 (drop the fourth), Gsus4 (drop the ninth), Gadd9 (the fourth becomes a major third), Gmadd9 (the fourth becomes a minor third), G7sus4 (the ninth becomes a flat seventh) or G11 (add the flat seventh).
Gsus2sus4 is a suspended chord — root and fifth, with a second or fourth where the third would be — or nothing at all. Suspended and power chords on every root.
On Gsus2sus4’s sound and use this page follows Robert Rawlins & Nor Eddine Bahha, Jazzology (Hal Leonard, 2005). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.