Chord sequence
G♭m7 E♭m7♭5 A♭m7♭5 G7♯11
In every key
Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.
Heard in Gb minor
Over Gbm7 · i7
Mode 2 of Major
Over Ebm7b5 · viø7
Mode 7 of Major
Over Abm7b5 · iiø7
Over G7#11 · subV7♯11
Mode 4 of Melodic Minor