Gaur joined the Officers Training Academy in September 1973 and received a short-service commission as a second lieutenant in the Bihar Regiment on 12 May 1974.

[4] Promoted major on 9 July 1986, he also joined in Defence Services Staff College and served as an instructor in the infantry school.

Gaur was posted as acting Lieutenant Colonel of 10 Bihar Battalion deployed at Baramulla district of Jammu and Kashmir in 1994.

[5] On 29 November 1994, his unit received information from the intelligence sources about 15 to 17 terrorists in Bazipora village of Baramulla district and he planned a cordon operation in the area.

Despite the heavy exchange of fire, he kept moving forward and killed All terrorists.