Born in Yerevan in 1981.
In 2003, he graduated from the Acting department of the Yerevan State Institute of Theatre and Cinema.
He started working as an actor at the Hamazgayin State Theatre in 1999. Past roles include, "Oh, Women, Women" (Jermaine Vinion), "Christmas at the Cupiello's" (Paskuilno), "Lyu-Beouf" (Bandit, Grandmother, Husband), "Bread Problem" (Mikita Sako), "Oscar" (Michael Martin), "Oskan Petrovich in the Afterlife" (Oskan), "Shkhonts Mihran" (Mihran), "Poor Petros" (Onnik), "Trap" (Kyure), "The Threepenny Opera" (Brown), "Jack-Pot" (Slayton), among others.
In 2003, Gagik Madoyan won the award for Best Actor from the Yerevan State Instiute of Theatre and Cinema for his performance in "Oskan Petrovich in the Afterlife." In 2006, he received the "Artavazd" award for Best Young Actor from the Union of Theater Figures of Armenia for his performance in "Shkhonts Mihran." He received the same award in 2014 for his performance in "Uncle Vanya."
In 2011, he was awarded a diploma from the Ministry of Culture for his contribution to the performing arts.