"Go Flex" debuted at number 94 on the Billboard Hot 100 for the chart dated May 14, 2016. It re-entered at number 100 for the chart dated October 14, 2017, over a year later, reaching a new peak of number 88, two weeks later. It spent 10 weeks on the charts. The song was certified platinum by the Recording Industry Association of America (RIAA) for sales of over one million units in the United States.
