Here under a new paper about Normandy and Burgundia (NF Burgoyne!) Iron Age Gaulish sites -
Under paywall allas! the Bernard Sécher Free Blog speaks about it in french : it seems they did not make an autosomal analysis, but I have not read the paper. (I hope it has not been opened a similar thread in another place here).
I can just copy the B. Sécher abstract if necessary?

https://doi.org/10.1016/j.jasrep.2019.101942