Towards the end of the 1960s, the Ami 6 then the Ami 8 are selling well. But Citroën feels that these cars fail to fully meet the expectations on the "mid-size versatile" segment.
Eureka at the end of 1970: after two failed projects, the GS comes along to brilliantly fit the bill. It is voted Car of the Year 1971 thanks to its tense, modern styling and intelligent, avant-garde technology (hydropneumatic suspension, four disk brakes, air-cooled 4-cylinder engine). The station-wagon and service versions appear in 1972. The short-lived GS Birotor with a rotary engine crowns the range between 1973 and 1975, before falling victim to the first oil crisis. The GSA, the last model produced up until 1986, drives up the sales figures to nearly 2 million for this range, all versions included.