This chord is played start on fret 3 Minor seventh chord with added 13th (6th). Most of the time the 5th is left out (3rd note). The 13th = 6th 13th is used when the chord is a 7th chord with added 6th 6th chords are not 7th chords with added 6th.
Scale structure: R-m3-5-m7-13
Note: G Bb D F E
Alternative names: Gminor13, Gmin13, Gm7/13, Gm7(add13), G-7(add13), G-7/13, Gmin7/13, Gmin7(add13), Gm7/6, Gm7(add6), G-7(add6), G-7/6, Gmin7/6, Gmin7(add6)
Importance: Rarely used