The G flat minor augmented chord is a 3-note chord consisting of the notes Gb, Bbb and D.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Gbm#5.
Interactive piano diagram for the G flat minor augmented chord
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows
the notes for the the Gbm#5 chord. Feel free to save or share the image as needed.