Ka cika wannan magana: A gasar Olympics ta 2012 a Omaha, Nebraska, wanda ya cancanta ga tawagar Olympics ta Amurka, McGill ya zama na biyu a tseren mita 100 na malam buɗe ido tare da lokaci na 51.32 seconds, kawai a baya Michael Phelps kuma kawai a gaban Ryan Lochte. A Wasannin Olympics na 2012 a London, McGill ya sanya na shida a gasar
100-mita butterfly, kuma ya sami lambar zinare ta hanyar yin iyo a cikin wasan farko na tawagar Amurka da ta yi nasara a tseren mita 4 × 100.