Gakeme represented Burundi in the 800 metres at the 2013 World Championships; he set personal bests in both the heats (1:46.70) and semi-finals (1:45.39), but failed to qualify for the final. At the 2014 African Championships in Marrakech he placed seventh. In 2015, Gakeme won the 800 metres at the European Champion Clubs Cup, running a championship record 1:45.77; he was also part of Playas de Castellón's 4 × 400 metres relay team, which won in 3:07.92. Playas de Castellón won the club championship by two points.