Lieutenant General Gustav Ivar Vilhelm Gewert (4 August 1891 – 25 February 1971) was a Swedish Army officer.

He was commanding officer of the Intendenturtruppernas studentkompani from 1923 to 1925 and served as adjutant of the Quartermaster-General of the Swedish Army Axel Hultkrantz from 1925 to 1934, when he was promoted to major.

[1] Gewert was promoted to lieutenant colonel in 1936 and served as head of the Equipment Office in the Commissary Department (Intendenturdepartementets utrustningsbyrå) from 1936 to 1942.

[1] He was promoted to major general in 1945 and in 1946 he was appointed Quartermaster-General and head of the Swedish Army Quartermaster Corps.

Gewert was a member of the Swedish National Board for Economic Defense Preparedness (Riksnämnden för ekonomisk försvarsberedskap) from 1947 to 1957.