Gakosso, an ethnic Mbochi,[2] was born in Inkouélé, located in the Gamboma District of Plateaux Region, He graduated with a degree in journalism from Leningrad State University in 1983, then joined Sorbonne in France.

Speaking on the occasion, Gakosso said that he had prioritized the restoration of the flame when he took over as Minister of Culture because "it symbolizes the pain, resistance, self-sacrifice, and courage embodied by President Marien Ngouabi.

[11] In the June 2007 parliamentary election, Gakosso stood as the Congolese Labour Party (PCT) candidate in the Ongogni constituency of Plateaux Region.

[21] Gakosso met with Russia's Minister of Foreign Affairs, Sergei Lavrov, in Moscow on 3 November 2015, and the two reaffirmed the good relations between their countries.

[24] Gakosso visited Russia in March 2017 and met with Russian Foreign Minister Sergei Lavrov to discuss continued and improved cooperation between their two countries.