[1] Gray first attended Washington-Marion Magnet High School, leading them to the 2010 Louisiana Class 4A State Semifinals in his sophomore season.

In his senior season, he transferred to Wheatley High School where he averaged 24 points, six assists and three steals and led them to the Class 4A playoffs.

[2] Gray began his college career at Texas Tech, averaging 26.7 minutes per game, 9.3 points, 3.2 assists and 2.5 steals as a freshman.

In his sophomore season, he transferred to Odessa College, averaging 34.7 points, 5.9 assists and 2.7 steals, earning First Team JC All-America honors and the conference MVP.

[3] On November 12, he made his professional debut in a 121–104 win over the Iowa Energy, recording 13 points, three rebounds and three assists in 18 minutes off the bench.

[5] On February 1, 2018, after Isaiah Canaan fractured his fibula the previous night against the Dallas Mavericks, the Phoenix Suns signed Gray to a 10-day contract[6] to help shore up the point guard spot a bit.

[7] He made his debut a day later, recording 7 points, 1 rebound, and 1 assist in 8 minutes of play in a blowout loss to the Utah Jazz.