Banjo Gaug chord (Double C)G augmented on the 5-string banjo: 3 4 3 5, and 3 more shapes

Frets, string 4 to string 1: 3 4 3 5 (from the 3rd fret)

1. String 4 (C): 3rd fret, index finger (barre), D♯
2. String 3 (G): 4th fret, middle finger, B
3. String 2 (C): 3rd fret, index finger (barre), D♯
4. String 1 (D): 5th fret, ring finger, G
5. String 5, the short g: open, G, in the chord

Sounds: D♯ B D♯ G  ·  Gaug is G, B, D♯ (1 · 3 · ♯5)

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

Double C tuning: gCGCD, the short 5th string first, then strings 4 to 1.