 In 1790 the young Gillet was sent by the electors of Rochefort to the assembly of Pontivy and in May of the same year he was elected to a position in the administration of the newly-created département of Morbihan.On 5 September 1791 Gillet was elected as an alternate deputy to the National Legislative Assembly but he was never called on to take a seat.Seven days later he was appointed procureur-général-syndic of Morbihan, making him, at 25, the highest-ranking local political figure.