guitar chord
G♭13
Seven notes in theory and four or five in anyone’s hands: root, third, seventh and thirteenth carry it.
Written the other way round it is F♯13 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
242340
hard · barre · no 9
xx4340
easy · no 5, 9
242342
hard · barre · no 9
24234x
hard · barre · no 9
x9b9bb
hard · barre · no 9
What is true of it
G♭13 is G♭, B♭, D♭, F♭, A♭ and E♭ — 1, 3, 5, b7, 9 and 13 counted from G♭.
On an instrument that cannot reach all 6, the 5, 9 and 1 go first, in that order.
The easiest of the 5 fingerings below is 242340: 4 fingers, one of them barring the 2nd fret, held at the 2nd fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
4 of the 5 need a barre.
It leaves out the 9. 6 strings cannot carry 6 notes, and the 9 is the one this chord can lose without changing what it is.
Where its notes are on the neck
The brass dots are G♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
G♭13/B♭
x11120
G♭13/D♭
x44340
G♭13/F♭
011120
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.