Gulley attended Central High School in Beaumont, Texas, where he averaged 18 points, 6 rebounds, 3 assists and 2 blocked shots a game in his senior year.
Gulley earned NJCAA Division II first-team All-America honors in 2010–11 after helping Coach Scotties to a 22–14 record and Region VI title.
[6] On October 27, 2019, Gully recorded 26 points, 5 rebounds, 5 assists and 3 steals, including a three-pointer at the buzzer to give Gilboa Galil a 91–89 overtime win over Maccabi Ashdod.
[7] On December 1, 2019, Gulley recorded 32 points, while shooting 12-of-24 from the field, along with eight rebounds, nine assists and five steals for 42 PIR, leading Gilboa Galil to a 115–106 double overtime win over Ironi Nes Ziona.
[8] On January 18, 2020, Gulley recorded a double-double of 30 points with a career-high 16 rebounds, while shooting 11-of-17 from the field, along with five assists for 51 PIR in a 96–80 win over Ironi Nes Ziona.