Guitar chords in the key of G:
G Am Bm C D Em F#dim

Chord Gm (10th fret) notes: (D), G, D, G, Bb and D.

This chord is played by placing a barre on fret ten with your index finger. The note D on the sixth string is not required, but can be played on the 10th fret if needed.

G minor chord's alternative names:
Gmin, G-, (Sol minor, G moll).

Steps: 1-b3-5.
1(G), b3(A#/Bb), 5(D).