It also participated in 16 seasons of the Liga I, the highest level of the Romanian league system, and lost a Cupa României final to CCA București in 1951.

Gaz Metan registered its debut in European competitions in the 2011–12 campaign, when it defeated KuPS and Mainz 05 prior to being eliminated by Austria Wien in the UEFA Europa League play-off round.

After the dissolution of the club in 2022, some of its former players and coaches founded ACS Mediaș 2022, which has the purpose of continuing the football tradition in the town.

After the second round, disgruntled players complained to the press and the Romanian Football Federation (FRF) about the club's poor training conditions.

The 1948–49 team was anchored by Kodacek – Sulyak, Szobo – Șerban, Molnar, Rășinaru – Pop, Coman, Guța, Szabo, and Pologea.

The Transylvanian team was promoted after one year by winning the third series of the third league, five points ahead of second-place Petrolul Stoina from Gorj County.

Coached by Jean Gavrilă, Gaz Metan won promotion by winning the second group of the 1999–2000 Divizia B, 11 points ahead of second-place ARO Câmpulung.

The team was composed of GK: Filip, Roșca – DF: Ciurar, Grigore, Grasu, Lungu, Șomfălean, Vasile -MF: Zotincă, Boroncoi, Callo, Hanc, Ioan, Moldovan, Pătru, Stoica – FW: Vitan, Boloban, Boaru, Găldean.

[6] However, the gaziștii finished 16th and last place with three victories, nine draws and 18 losses; 21 goals scored and 42 conceded for a total of 18 points, 16 less than 15th-place Rocar București.

In 2008, coached by former Gaz Metan player Cristian Pustai, the team was again promoted to Liga I: Ștețca – Grillo, Lazăr, Zaharia, Buzean – Dudiță, Eric, Hoban, Curtean – Boaru, C.Prodan.

After the corruption scandal involving FC Argeș Pitești and the team's relegation from Liga II, Gaz Metan remained in the first league.

The 2015–16 team consisted of Greab – Romeo, Cristea, Zaharia, Buzean – P.Iacob, Danci – Munteanu, Bic, and Petre – Gavra.

Now the team that represents Sibiu is FC Hermannstadt and the two clubs met for the first time on 17 April 2018, in a Romanian Cup semi-final, in front of many fans.