Born in Lannion, his childhood was spent with his nurse, either in Perros-Guirec, or in Trégastel. Following a legal judgement in his favour he bought a farm at Run-Rouz in Trégastel. He worked as a teacher in Gap, Évreux, Nevers and in Le Havre.
In 1886, he founded with Maurice Barrès and Raymond de Tailhède the literary review Les Chroniques.
Goffic wrote widely about aspects of Breton and broader Celtic cultural identity, emphasising the importance of local traditions and cultural continuity. His short stories Passions Celtes (1910) were widely influential on the Breton cultural renaissance.
One of them was dramatised by Le Goffic at the request of Guy Ropartz for the libretto of his opera Le Pays. Politically close to Charles Maurras, he collaborated on the Revue d"Action française (1899), which later became L"Action française (1908).
Although a convinced republican, his militant regionalism and his traditionalist ideals led him to support the "Maurrassisme" project to restore the monarchy, as his letter published in L"Enquête sur la monarchie (1900) testifies.
In 1895 he introduced the Great Highland Bagpipe to Brittany.