Guitar chords in the key of G:
Chord Gdim (5th fret) notes: G, Db, G and Bb. You must leave out the 6th and 5th strings.
Gdim - G diminished triad guitar chord's alternative names: G°, G-5, Gm-5, and Gdim. See also: Gdim7 and Gm7b5.
1(G), b3(A#/Bb), b5(C#/Db).