I'm still on track to hike the GR10 in July but have not yet decided on what to do about maps? I would like to buy a Harvey's type strip map of the route, although nothing found. I've thought of the normal tour guides and/or maps (Topo or Cicerone) but tour guides do not turn me on. I have looked at the possibility of downloading and printing A4 maps from the internet or buying Topo Guides, tearing out the map pages and then throwing the rest away. It has even crossed my mind, that for this walk, which will be a long one for me, to perhaps consider the purchase of a GPS? Any suggestions please.
for ipad there is an App called Outdoors France, a year subscription is around £15 per year, 1:25000 and 1:50,000 - GR10 is on the 1:25,000 - IMHO a good option if you can print at home before setting out.
Memory Map do an a series of IGN downloads - slightly dated but fine for GR10 - printable - probably the most pricey option
Paper IGN Maps - IMHO also a good option - GR10 well marked. Waterproof versions of IGN are available - have a red strip to identify
GPS - SATMAP do a variety of SD cards - I have 1:50,000 - I keep only for emergency use, GPS is switched off unless I need it in an emergency.
In general the GR10 is very well marked.
My approach to the Pyrenees is belt and braces bearing in mind I go off paths every now and then and in winter:
I print Memory Map sections and laminate and use for navigating.
Carry an IGN and a gps (switched off) in my rucksack as a reserve and for emergency.
I'd suggest that some evenings you'd be able to recharge a gps in accommodation; Gite's may pose some difficultly keeping in mind that lots of people will use in summer and therefore sockets will be in demand; that said some Gite's have twin rooms making socket use easier and also I carry a double extension so I can suggest/offer sharing if beaten to a socket. However, I have not found a refuge that provides charging facilities for gps yet.
I'd suggest keeping a gps for emergencies. Paper maps for normal nav.