[1] He became active in the Union for a Popular Movement (UMP) as a teenager but left the party in 2007 citing his disappointment with Nicolas Sarkozy.
However, the local UMP branch claimed to have expelled Gillet after he endorsed a deputy mayoral candidate in Caen who was not a member of the party.
[3] After moving to Gard he worked for Julien Sanchez's mayoral campaign and was elected as a municipal councilor for the RN in Nîmes in 2014.
[4] During the 2017 French legislative election, he stood in Gard's 1st constituency but was beaten in the final round by LREM candidate Françoise Dumas.
In 2022, Gillet was appointed head of the RN federation in Gard after Gilbert Collard left the party.