guitar chord
G♭m7
Minor triad with a minor seventh. The same four notes as a major sixth chord a third above.
Written the other way round it is F♯m7 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
202220
moderate
204220
moderate
242220
moderate · barre
20222x
moderate
242222
moderate · barre
What is true of it
G♭m7 is G♭, B♭♭, D♭ and F♭ — 1, b3, 5 and b7 counted from G♭.
B♭♭ is a double flat, and it has to be: every letter from G♭ upwards is used once, so the b3 cannot be written any other way.
These are also the notes of A6/G♭. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 202220: 4 fingers, 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.
2 of the 5 need a barre.
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♭m7/B♭♭
x04220
G♭m7/D♭
x44220
G♭m7/F♭
004220
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.