Mezue nkebi ahịrịokwu a: Na 2012 U.S. Olympic Trials na Omaha, Nebraska, nke a na-eme iji ruo eruo maka òtù egwuregwu Olimpik nke U.S., McGill bịara nke abụọ n'ọsọ 100 mita butterfly na oge nke 51.32 sekọnd, n'azụ Michael Phelps na n'ihu Ryan Lochte. Na 2012 Summer Olympics na London, McGill tinyere nke isii na 100 mita urukurubụba, ma nweta ihe nrite ọlaedo site na igwu mmiri na mmeghe maka ndị otu mmeri US na
4×100-metre medley relay.