6 events were there in Gymnasticsat the Games of the XXXI Olympiad . 29 July – 11 August 1984 was when it was held . The venue for Gymnasticsat the Games of the XXXI Olympiad was USTA Billie Jean King National Tennis Center,Arena Olímpica do Rio,Galatsi Olympic Hall (rhythmic) . The official site of Gymnasticsat the Games of the XXXI Olympiad is chicagomarathon.com . 136 from 29 nations competed in Gymnasticsat the Games of the XXXI Olympiad . 1963 is when Gymnasticsat the Games of the XXXI Olympiad was established 
More than 3 games were held in Gymnasticsat the Games of the XXXI Olympiad