Gdim is a diminished, spelled G, Bb and Db. In DADGAD tuning (D2 A2 D3 G3 A3 D4) the easiest shape is xx5345, which sits at fret 3, spans 2 frets and mutes 2 strings. 12 positions for it are shown below, from the nut up to fret 11.
Notes and intervals
Note
G
Bb
Db
Interval
1P
3m
5d
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
xx5345sits at fret 3, spans 2 frets and mutes 2 strings51504xsits at fret 1, spans 4 frets, lets 1 string ring open and mutes 1 stringx108010xsits at fret 8, spans 2 frets, lets 1 string ring open and mutes 2 stringsxxx01311sits at fret 11, spans 2 frets, lets 1 string ring open and mutes 3 stringsx101101311sits at fret 10, spans 3 frets, lets 1 string ring open and mutes 1 stringxx5048sits at fret 4, spans 4 frets, lets 1 string ring open and mutes 2 stringsx108610xsits at fret 6, spans 4 frets and mutes 2 strings5453xxsits at fret 3, spans 2 frets and mutes 2 stringsxx534xsits at fret 3, spans 2 frets and mutes 3 stringsx4534xsits at fret 3, spans 2 frets and mutes 2 strings54501xsits at fret 1, spans 4 frets, lets 1 string ring open and mutes 1 stringxxx345sits at fret 3, spans 2 frets and mutes 3 strings
Keys Gdim belongs to
Gdim is diatonic to 8 of the 96 keys this app knows, playing a different role in each.