Georges, 28, returned the positive test for an "adverse analytical finding" for Heptaminol in a urine sample collected after stage seven of the race, on 10th May 2013.
Heptaminol is a vasodilator which helps relax the blood vessels and is sometimes used in the treatment of low blood pressure.
It is the same substance for which Kazakhstan's Dmitry Fofonov tested positive during the 18th stage of the Tour de France. Fofonov had completed the race in 19th place but was fired by his team Credit Agricole and banned for three months after the positive test. He was later cleared.
Heptaminol was wiped off the list of banned substances in 2004 but was reinstated in 2006. It is currently a specified substance which means the UCI does not impose a provisional suspension for a positive test.
Georges has nevertheless been pulled from the race by his Ag2R-La Mondiale team. He has the right to request and attend the analysis of his B sample.
Georges was part of a five-man break that formed 18km from the finish of stage four of the Giro, won by Enrico Battaglin. At one point, Georges held a one-minute advantage over the main pack but was swept up by the peloton after Italian veteran Danilo Di Luca attacked on the final climb of the stage.
Georges was 81st in the Giro general classification, trailing race leader Vincenzo Nibali by one hour, three minutes and 54 seconds.
Last year Georges won stage six of the Tour of California. He finished second in this year's Paris-Camembert.
In a busy day for the UCI, it was also made known that Venezuelan Miguel Ubeto Aponte of Lampre-Merida had been provisionally suspended after testing positive for the dangerous metabolic modulator GW1516.
Ubeto is not currently riding in the Giro and returned the positive sample in an out-of-competition test on 16th April 2013.
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