4-String Banjo Chord Chart and Tabs in Gbb Tuning

Sib6, SibM6, Sib maj6
Notes: Si♭, Re, Fa, Sol
6,0,6,0 (1.2.)
6,0,3,3 (3.12)
6,7,6,5 (2431)
6,10,8,0 (132.)