Every fingering that fits a hand
x667
moderate · barre · no 5
bacx
easy · no 5
bac9
hard · no 5
What is true of it
G♭7 is G♭, B♭, D♭ and F♭ — 1, 3, 5 and b7 counted from G♭.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 3 fingerings below is x667: 2 fingers, one of them barring the 6th fret, held at the 6th 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.
1 of the 3 need a barre.
It leaves out the 5. 4 strings cannot carry 4 notes, and the 5 is the one this chord can lose without changing what it is.
1 string stays silent.
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♭7/B♭
3604
G♭7/D♭
6667
G♭7/F♭
9a99
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.