Gebbie likewise failed to advance to the semifinals of both events he competed in. While he finished first during his heat in the men's 50 m freestyle with a time of 22.84 seconds, he ultimately placed 41st of 73 participants. Meawhile, in the men's 100 m freestyle he clocked a time of 49.64 seconds, breaking both his personal record and the Philippine national record of 49.94 seconds, which he set during the 2019 FINA World Championships,