Nearly everyone who walks the Le Puy route carries the Miam Miam Dodo guide with them, and this has route maps. (It is available from CSJ.) MMD have a website that includes maps and some gite listings.
http://www.chemindecompostelle.com/Selection/CarteFrance.html If you click on a rectangle, it brings up more detail for that area. It is much harder to get internet access in France than in Spain though, so you wouldn't be able to rely on regular access to this site en route.
The MMD book also has listings of pilgrim accommodation, including gites, chambre d'hotes (like bed and breakfast) and a few hotels. In France, unlike Spain, it is usually preferable to reserve a place a day or two ahead, or you might miss out on a bed in the gites and have to pay more for a chambre d'hote.
Margaret