G sharp suspended fourth flat ninth piano chord - G#b9sus
The G sharp suspended fourth flat ninth chord is a 5-note chord consisting of the notes G#, C#, D#, F# and A.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as G#b9sus.
Interactive piano diagram for the G sharp suspended fourth flat ninth chord
Chords that are a subset of G#b9sus. These contain less notes but all of them are included in G#b9sus.