| Clubname: | GS Ilioupolis |
| Fullname: | Gymnastic Club Ilioupolis |
| Ground: | Ilioupoli Municipal Stadium |
| Capacity: | 3,055 |
| Owner: | Giorgos Xristodoulopoulos |
| Chairman: | Fotis Theodorakis |
| Manager: | Nikos Pantelis |
| League: | Super League Greece 2 |
| Season: | 2023–24 |
| Position: | Super League Greece 2, 4th |
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GS Ilioupolis (Greek, Modern (1453-);: Γ.Σ. Ηλιούπολης) is a multi-sport club based in Ilioupoli, Greece.
The club was founded in 1953, and it has about 2,000 athletes competing in nine sports.[1]
GS Ilioupoli's colours are red and blue and its logo features a setting sun on its nearby mountains and the ground.[1]
The football team of Ilioupolis achieved promotion to the Beta Ethniki (2nd tier championship) during the 2021-22 season.
Ilioupolis has basketball team both men's and women's. The basketball team of GS Ilioupolis plays in the Athens local divisions. Biggest success of the club was winning the Gamma Ethniki championship, in the season 1994-95
The women’s volleyball team of GS Ilioupolis plays in the A1 Ethniki (1st-tier championship). It plays for 2nd consecutive season in A1 Ethniki and has played again in the past, from 1995 to 1999.
GS Ilioupolis water polo team plays in A1 Ethniki Water Polo. It won the ascension during the last season (2014–15) when it finished in the 2nd place in A2 Ethniki championship.[2]
Ilioupoli had a futsal team. This team had won a Greek cup in 2009. In the same year it was the finalist of the championship. The next years, Ilioupoli Futsal team finished in the 5th or 6th place of the championship until 2012 when the team withdrew from the championship.[5]