Jaan Hjorth, Italian car enthusiast and specialist, owns two.
He used to have some more in the past.
Jaan is a very interesting character - besides being a great specialist on Italian and French cars he is also a winemaker, rock musician and sound engineer.
He specialises in vintage Italian cars, but he uses GSes for daily driving.
Both GSes have been converted to electronic fuel injection.
His workshop is named Eddins Moto:
Jaan and his work was mentioned in an article in New York Times:
The video shows a short drive around Berkeley in Jaan's Citroen GS Pallas.