A Lament for Ancient Games in Modern World of Doping(2004, Aug 3) New York Times by C. Driefus[link]
This is an article/interview with Thomas H. Murray, President of The Hastings Center [who also wrote the forward for GMA]. The article is not specifically about gene doping, though Murray does suggest that Athens might be remembered as the 'Gene Games'.
While Murray and others have indicated that gene doping should not be a concern for Athens 2004, he does draw atention to work that is paving the way for such applications.
Of particular concern to Murray is the prospect that athletes might be misled into believing that they have been enhanced by a scientist, when, in fact, they could not have been.