As a young student at the Rochefort Navy Medical School he took part in the combat against cholera, from which the city of La Rochelle was suffering.
[2] As a naval surgeon he visited French colonies in the Indian Ocean: first Réunion island and then Mayotte in the Comoros archipelago.
During this expedition he wrote a thesis on diseases prevalent among individuals of African and European descent in the Comorro Islands.
[2] He also wrote Voyage a i'lle de la Réunion, a memoir published much later, in 1905, in which he described colonial life and the abolition of slavery.
After retirement at the age of 72, Gélineau dedicating his time to the cultivation of vines and wine production, continuing the family tradition.