Banjo G7 chord (Open G)G seventh on the 5-string banjo: 0 0 0 3, and 5 more shapes

Frets, string 4 to string 1: 0 0 0 3 (open position)

1. String 4 (D): open, D
2. String 3 (G): open, G
3. String 2 (B): open, B
4. String 1 (D): 3rd fret, index finger, F
5. String 5, the short g: open, G, in the chord

Sounds: D G B F  ·  G7 is G, B, D, F (1 · 3 · 5 · ♭7)

The 5th string: the short g is the root of G7, so let it ring.

Up the neck: F7 shape: 5 4 3 3 (3fr); E7 shape: 5 4 6 5 (4fr); D7 shape: 5 7 6 9 (5fr); Barre 7 shape: 12 12 12 15 (12fr). Slide a shape up or down to play another chord of its kind.

Open G tuning: gDGBD, the short 5th string first, then strings 4 to 1.