| Event: | Gymnastics |
| Games: | 2005 |
| Venue: | Rizal Memorial Coliseum |
| Location: | RMSC, Malate, Manila |
| Date: | November 29 – December 5 |
| Prev: | 2003 |
| Next: | 2007 |
Gymnastics at the 2005 SEA Games was divided into three sub-categories: artistic gymnastics, rhythmic gymnastics, and aerobics. The artistic gymnastics was held from November 29 to December 1, the rhythmic gymnastics from December 2 to December 3, and the aerobics from December 4 to December 5. All events were held at the Rizal Memorial Stadium at the Rizal Memorial Sports Complex, in Malate, Manila, Philippines.
| Team all-around | Mohd Azzam Azmi Yap Kiam Bun Ng Shu Mun Ng Shu Wai Ooi Wei Siang Wan Foong Lum | Apichart Charoenrattanakul Aekaraj Chankroong Kittipong Yudee Natthaphong Changphrak Rartchawat Kaewpanya Thitipong Sukdee | Al Ramirez Brydon Sy Neil Faustino Roel Ramirez Ronnie Ramirez |
| Trương Minh Sang Hầu Trung Linh Hoàng Cường Nguyễn Hà Thanh Nguyễn Minh Tuấn Phạm Phước Hưng | |||
| Individual all-around | |||
| Floor | not awarded | not awarded | |
| nowrap | |||
| Horizontal bar | |||
| Parallel bars | |||
| Pommel horse | |||
| Rings | not awarded | ||
| Vault | not awarded | ||
| Team all-around | Lee Wen Ling Nicole Tay Xi Hui Lee Wen Si Lim Heem Wei Tabitha Tay Jia Hui Nur Atikah Nabilah | Đặng Thị Thu Thủy Dương Minh Hằng Trần Thị Phương Thảo Nguyễn Thùy Dương Đỗ Thị Ngân Thương Phan Thị Hà Thanh | Kai Ling Tan Tracie Ang Nurul Fatiha Abd Hamid Nabihah Ali Sau Wah Chan | |
| Individual all-around | ||||
| Balance beam | ||||
| Floor | nowrap | |||
| Uneven bars | nowrap | |||
| Vault |
| Team all-around | Foong Seow Ting Durratun Nashihin Rosli Wen Chean Lim See Hui Yee | Tharatip Sridee Ploychompoo Payonrat Thanattra Limpasin Surutchana Parapho | Lưu Hoài Thu Nguyễn Thu Hà Trần Thị Minh Thu |
Putri Sari Fatimah Cici Mitasari Nathalia Winindo Windy Yofilia | |||
| Individual all-around | |||
| Ball | |||
| Clubs | |||
| Ribbon | not awarded | ||
| nowrap | |||
| Rope | |||
| Men's individual | ||||||
| Women's individual | nowrap | nowrap | nowrap | |||
| Mixed pair | Nattawut Pimpa Suwadee Phrutichai | Nguyễn Tấn Thành Nguyễn Thị Thanh Hiền | Yuanita Mailusia Sugianto | |||
| Men's trios | Kittipong Tawinun Phairach Thotkhamchai Chanchalak Yiammit | Lody Lontoh Faizal Amirullah Fahmy Fachrezzy | Nguyễn Thanh Huy Nguyễn Tấn Thành Thai Anh Tuan |