Eb sus4/Gb
The Eb sus4 chord consists of the Eb (Perfect unison), Ab (Perfect fourth) and Bb (Perfect fifth) notes, with Gb as the bass note.

How to play the Eb sus4/Gb chord
- Play Gb as the lowest bass note in the left hand
- Find Eb (Root) on the piano keyboard
- Add Ab (Perfect fourth) — 5 semitones above Eb
- Add Bb (Perfect fifth) — 7 semitones above Eb
- Press all 4 notes simultaneously to sound the Eb sus4/Gb chord