Banjo Gsus4 chord (Open D)G suspended 4th on the 5-string banjo: 0 1 3 0, and 5 more shapes

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

1. String 4 (D): open, D
2. String 3 (F♯): 1st fret, index finger, G
3. String 2 (A): 3rd fret, ring finger, C
4. String 1 (D): open, D
5. String 5, the short f♯: open, F♯, not in the chord

Sounds: D G C D  ·  Gsus4 is G, C, D (1 · 4 · 5)

The 5th string: the short f♯ rubs against the G in this shape, a semitone away: some players let it ring, some skip it.

Open D tuning: f♯DF♯AD, the short 5th string first, then strings 4 to 1.