At the 2003 SEA Games edition, Gymnastics was divided into three sub-categories: artistic gymnastics, rhythmic gymnastics, and aerobics. The artistic gymnastics was held from December 5 to December 8, the rhythmic gymnastics from December 9 to December 11, and the aerobics gymnastics on December 12. All events were held at the Quần Ngựa Sports Palace, in Hanoi, Vietnam.
December 5
December 6
December 8
December 8
December 8
December 5
December 8
December 8
December 8
December 5
December 6
December 5
December 8
December 8
December 8
December 8
9 December
Team competition is only for countries with at least 3 participating/entries of gymnasts. Only gymnasts competing in at least 3 apparatus can compete for the all-around qualifications; with the top three highest scores counted. Team competition also served as qualification for the event finals. Three gymnasts per team compete on each event, and the best ten of the scores out of twelve scores count.
10 December
11 December
11 December
11 December
11 December
12 December
12 December
12 December
12 December