The Gb/Db chord is a Gb Major chord, with the Db (the 5th) as the bass note.
The chord is also referred to as Gb over Db, or Gb ‘slash’ Db, or simply, G flat with a D flat in the bass.
Technically, the Gb Major chord with the Db in the bass is a second inversion Db Major chord.
Some Gb/Db Chord Theory and Info
- The Gb/Db chord contains the notes Db, Gb and Bb.
- It is a Gb Major chord with a Db in the bass.
- The root note of Gb/Db is Gb, the bass note is Db.