Can confirm he was a Light Brigade charger.
"All 8 officers were in the front of the first line with the exception of Cornet George Gardner who was doing the duties of RSM. Gardner had been RSM until a month previously but as his replacement was not available he undertook his old duties"
An RSM's station was bringing up the rear, behing the rear rank.
As far as I can tell from the Medal roll, he received a 4-clasp medal for Alma, Balaklava, Inkerman & Sebastopol (it's a bit hard to read in places). He also received the Turkish medal and 5th Class Order of Medjidie.
He seems to have survived the war unscathed.