Gaumont gave a series of interviews, and wrote a book, Prisonnier du dopage ("Prisoner of doping") in which he explained doping methods, masking methods, the use of drug cocktails such as the pot belge for training and for recreation, and how the need to make money makes racers dope themselves.
In April 2013 he suffered a major heart attack and was reported to be in a coma.
On 13 May 2013, several news sources reported his death, but according to La Voix du Nord he remained in an artificial coma, though had suffered brain death.