Key Of Gb Major...
 
Key of:    Gb Major
 
        7 Tones in key:              Gb, Ab, Bb, Cb, Db, Eb, F      (I, ii, iii, IV, V, vi, vii)
        3 Primary Chords:         Gb, Cb, Db                              (I, IV, V)
        3 Secondary Chords:     Abm, Bbm, Ebm                      (ii, iii, vi)
        Dominant 7th chord:      Db7                                         (V7)
  Danman says..."Check out the chart"...Gb Major
 

Scale Step	Root	3rd	5th	Chord Type
I	Gb	Bb	Db	Major
II	Ab	C	Eb	Minor
III	Bb	Db	F	Minor
IV	Cb	Eb	Gb	Major
V	Db	F	Ab	Major
VI	Eb	Gb	Bb	Minor
VII	F	Ab	Cb	Diminished