The G minor/major ninth chord is a 5-note chord consisting of the notes G, Bb, D, F# and A.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as GmM9.
Chords that are a subset of GmM9. These contain less notes but all of them are included in GmM9.
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 GmM9 chord. Feel free to save or share the image as needed.