Gymnastikos Syllogos Marko Markopoulou () is a Greek football club based in Markopoulo Mesogeas. Its official founding year is 1927. Its official colors are green and white. Its emblem is a vine leaf. It uses the Municipal Stadium of Markopoulo Mesogeas as its home ground.
The club currently maintains a football department, while it previously had departments in athletics, basketball, volleyball, cycling (founded in 2016), and table tennis.
The football team belongs to the East Attica Football Clubs Association and has competed for many years in the Fourth National Division and the Third National Division, while in recent years it has participated in the local championship of the FCA East Attica.
GS Marko was founded in 1927 and was officially recognized by the Athens Court of First Instance in 1930 by decision number 7839. In 1961, it was officially recognized by the HFF with Registry Number 932 and joined the FCA Athens, beginning its official competitive activities in the 1961âÂÂ1962 season.
In 1969, the club reached the top division of the FCA Athens for the first time, competing from the 1969âÂÂ1970 season until the 1972âÂÂ1973 season. In 1978, it returned to the top division of the FCA Athens and established itself there from the 1978âÂÂ1979 season onward.
In 1984, it was crowned super champion of the FCA Athens and was promoted to the National Amateur Division, where it competed during the 1984âÂÂ1985, 1985âÂÂ1986, and 1986âÂÂ1987 seasons. In 1994, it was crowned champion of the FCA Athens again and was promoted to the national leagues, establishing itself in the Delta Ethniki and Gamma Ethniki divisions for over 15 years until 2010.
In 1995, the club immediately won the Delta Ethniki championship and was promoted to the Gamma Ethniki, where it competed from the 1995âÂÂ1996 season until the 2004âÂÂ2005 season. It then played in the Delta Ethniki from 2005âÂÂ2006 until 2009âÂÂ2010, after which it was relegated to the local championships of the East Attica Football Clubs Association after 16 years in the national championships.
In 2019, it won the FCA East Attica championship and returned to the national leagues.
In 1984, the club was a finalist in the FCA Athens Cup, and in 1994 it won the Cup by defeating A.O. Agios Ierotheos of Peristeri in the final. It was also a finalist in the FCA East Attica Cup in 2006, 2007, and 2018.
In the 2019âÂÂ2020 season, it finished 2nd in Group 6 of the Gamma Ethniki (now the 4th division). In the 2020âÂÂ2021 season, it finished 9th in Group 6 and was relegated to the local championships. In the 2021âÂÂ2022 season, it won the A' Category championship of the FCA East Attica and finished 3rd in the Champions of FCAs Championship 2022, securing promotion back to the Gamma Ethniki.
In the 2024-25 season, Marko has achieved the first place in the 4th Group of Gamma Ethniki and for the first time in its history, it was promoted to the professional Super League Greece 2 championship after beating Ilisiakos 2-1 in the penultimate match of the season, finishing the season with a total of 22 wins, 8 draws and 2 losses in 32 matches, becoming the third club from the region of Mesogeia to participate in the Second Division since AO Koropi which participated in the Beta Ethniki from 1969âÂÂ70 to 1976âÂÂ77 seasons and Aittitos Spata in 2018-19.
In the 2025-26 season, Marko participated in the Superleague 2 South Group, under the guidance of coach Soulis Papadopoulos, who is seasoned in the Second highest Category of Greek football with 384 matches in his career , has managed to achieve the 3rd place in the group in their first year participating in the league, finishing behind Kalamata and Panionios, scoring 9 victories, 4 draws and 5 defeats in the main season and 2 victories, 3 draws and 1 defeat in the Promotion Playoffs.
League participation since 1984'
Official website