Carte extrait Géoportail
Depending on whether you come from Erquy, Pléneuf or St-Brieuc, your stage will be more or less trying and the last kilometers very long!
You can reach La Stabulle-Gîte d'Etable by cutting the GR34 a little and taking advantage of the short hiking paths.
A top tool, free and efficient: the Geoportal site which allows you, by choosing the IGN 25th topographic map, to discover the PRs near your main route.