Eb m7/Gb
The Eb m7 chord consists of the Eb (Perfect unison), Gb (Minor third), Bb (Perfect fifth) and Db (Minor seventh) notes, with Gb as the bass note.

How to play the Eb m7/Gb chord
- Play Gb as the lowest bass note in the left hand
- Find Eb (Root) on the piano keyboard
- Add Gb (Minor third) — 3 semitones above Eb
- Add Bb (Perfect fifth) — 7 semitones above Eb
- Add Db (Minor seventh) — 10 semitones above Eb
- Press all 5 notes simultaneously to sound the Eb m7/Gb chord