The most common Korean word for “gym” is 체육관 (cheyukgwan). There is one more word with a similar meaning — compare them below. 「gym」는 한국어로 체육관.
Learn 체육관 free — flashcards, audio and review →「체육관」 단어장으로 무료로 외우기Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato