Gb Major Seventh for 7 String Guitar
A Gb Major seventh chord, also written as Gbmaj7, GbΔ7, Gbma7, GbM7 or GbΔ contains the notes Gb, Bb, Db and F. The chord is comprised of the intervals M3, m3 and M3.
G
B
D
F
M3
m3
M3