She was cheered on by her boyfriend and mum, Corrina, as she competed in the NRHA European Derby in Lyon, dressed like a cowgirl in a grey stetson and bejewelled waistcoat.
Gina, 20, tore up the sand on her brown and white horse at the Euroexpo arena where winners can claim prizes from a pot of £140,000.
Photos show the daredevil holding on with just one hand as her horse powerfully galloped around the arena and performed a series of sharp turns.
The annual competition tests the agility of both the horse and the rider, and attracts thousands of spectators each year.
Considered as the “dressage” of the western riding world, reining is the only western riding discipline recognised by the Fédération Equestre Internationale (FEI).
And the western rider looks set to follow in her father’s footsteps of sporting success as she has won a number of equestrian competitions in recent years.
This was a rare public appearance for the family away from her former racing champ dad’s bedside.
Legend Michael is on a long road to recovery after suffering a devastating head injury while skiing in the French Alps in 2013.
The 46-year-old was put into a medically induced coma and underwent two life-saving operations at Grenoble Hospital in France.
In an interview, Mr Weber said: “I find it very unfortunate that Michael’s fans do not know about the state of his health.
“Why do not they just tell them the truth?”
Earlier this year Mr Weber, who helped guide Schumacher to seven F1 titles during a 20-year partnership, said he was no longer on contact with his protege or the family.
He said: “The Schumacher family seems to be afraid of me. I sent the family flowers and cards for his birthday but I got no answer. That makes me sad.
“There seems to be the fear that I would disclose something about Michael’s condition but I would never do that. I would even sign a non-disclosure agreement.”