It is a Microcar from the "L-GL-GLX" generation.
More precisely, it is the facelift version, with a longer nose and flush-mounted headlights (borrowed from a Fiat Panda). The first gen had the trim name before the engine number (L 50, GL 50, GLD 50), these versions reverted it.
I bet it is the 300 GL, with the bigger 273 cc Yanmar L60 (replacing the tiny 199 cc L40 used on the LD/GLD 50), as the picture seems to be taken at the Jeanneau Microcar stand at the 1986 Paris Motorshow.
One year later, a twin-cylinder 600 GL, using the "monster" Ruggerini 654 cc became available with this body, as well as a restyled 125 GL. Another big change was the fitting of a brand new braking system, removing the weird-as-hell Luchier "annulus discs" to more classical drums.