4-String Banjo Chord Chart and Tabs in Gbb Tuning

Cbo7, Cb°7, Cb dim7
Notes: C♭, E♭♭, G♭♭, B♭♭♭
7,7,6,6 (2311)
7,10,9,0 (132.)
10,10,0,6 (23.1)