Gun Temur (1377-1402) was the Mongol Khagan of the Northern Yuan Dynasty in Mongolia. He was the eldest son of Elbeg Nigulesugchi Khan. He ruled from 1400 to 1402. In 1402; he was defeated and killed by by Gulichi. Several months after his death; he was succeeded by his younger brother Oljei Temur Khagan Bunyashiri.

The eldest son of Elbeg Niguulsegch Khan; Guntumur was born in 1377; the red snake year. He ascended to the throne in 1400; though the split between the Oirats and Mongols was even greater during his reign. He was killed in 1402; the black horse year.