Every fingering that fits a hand
0212
open
0532
easy · no 5
x778
moderate · barre · no 5
What is true of it
G7 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 0212: 3 fingers, held at the 1st fret.
1 of them use open strings, which is what makes a shape quiet to change to.
1 of the 3 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
G7/B
4535
G7/D
7778
G7/F
abaa
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.