Gabriel Tiacoh was a sprinter from Côte d'Ivoire who specialised in the 400 metres. He is best known for winning his nation's first Olympic medal, in the 400 meters in 1984.

The men's 400 metres was an event at the 1984 Summer Olympics in Los Angeles, California. It was held from August 4 to August 8. Eighty athletes from 56 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Alonzo Babers, returning the United States to the top of the podium for the first time since 1972. Gabriel Tiacoh won the Ivory Coast's first Olympic medal in any event, with a silver.