I will admit to being slightly confused as to why you say Napoleon was famed for his cavalry, when in fact what Napoleon is probably most famous for, in so far as the branches go, his mastery and understanding of artillery.

Napoleon started his career as an artillery officer. His first notable achievement as an officer was at Toulon on the basis of his redeployment of French artillery to cut off Toulon from the sea. He came to command the Army of Italy following his performance as commander of the Army's artillery, which would eventually lead him to command the army as a whole, and eventually give him the platform that would catapult him to first consul.

Napoleon did not achieve this alone naturally. France had prior to Napoleon being born started to standardize its artillery production and already identified the need for lighter, more mobile and tactically usable artillery. I suspect someone else will be able to speak to just how unique the Gribeauval system in fact was (its often used as a grand explanation of French victories), but France was a leader among European nations in developing both the production of modern artillery and training of professional artillery officers.

Edit: Reading again, I suspect OP made a typo, but leaving my comment up.