I don't know for certain, but it was probably because of the Franks or Frankish peoples that settled in much of the territory.
Gaul
Gaul.
France was referred to as Gaul (or Gallia) during the Roman Empire. Gaul included not only France but also the modern countries of Belgium, Luxembourg, most of Switzerland and part of Italy.GALLIA, usully anglicised as GAUL
Gaul was the Roman period name of the area now called France.
There was no country called Gaul in Roman times. The present day connotation "Gaul" is considered to be the country of France. However in Roman times "Gaul" was a vast territory stretching from northern Italy and beyond. The territory called Gaul was/has been divided into several present day countries.
The Romans called France, Gaul.
Gaul
Brittany
Gaul is the name the Romans gave to the area which is (mostly) located where is France today.
Gaul today is known as France.
Gaul is France, in a way. Gaul was not a country, it was a territory. We generally consider present day France as Gaul, but ancient Gaul encompassed much more territory than France alone. It ranged loosely from Germany to Spain and from northern Italy to the English channel. It was inhabited by mostly Celtic tribes.
Gaul.
Gaul [France]
Modern France is approximately where Gaul was.
France was referred to as Gaul (or Gallia) during the Roman Empire. Gaul included not only France but also the modern countries of Belgium, Luxembourg, most of Switzerland and part of Italy.GALLIA, usully anglicised as GAUL
The land where France would be was once called Gaul, around the time of Rome.
The Romans called it Gallia - Gaul; to be precise, Gallia Transalpina, Gaul beyond the Alps.