guitar chord
G♭m
The major triad with its third lowered by a half step.
Written the other way round it is F♯m — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
244222
moderate · barre
20422x
moderate
2042xx
easy · no 5
24422x
moderate · barre
244225
hard · barre
What is true of it
G♭m is G♭, B♭♭ and D♭ — 1, b3 and 5 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.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 244222: 3 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.
3 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♭m/B♭♭
x04222
G♭m/D♭
x4422x
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.