Born in Toulouse, Gros married Félicité Labille in 1764, becoming the brother-in-law of Adélaïde Labille-Guiard. She died four years later, and in 1770 he remarried, to the painter Pierrette-Madeleine-Cécile Durand. He was active as a miniaturist and pastellist during his career. Some sources give his date of birth as 1725.
- Profile at the Dictionary of Pastellists Before 1800.
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