 ~30 students, ~4 classes in every year) are competing against each other in sport, art, academic and "unconventional" disciplines to win the overall title.Every games have their official name/mascot, which traditionally includes letters O and H. The OH Gamča in school year 2017/18 are officially called OH Kolobeh 2017.Both current students and alumni are called Gamčáci (m) and Gamčáčky (f).