All the GPX files you will need you can find on https://e1.hiking-europe.eu. This is my source for the GPX files. The files you can find here are per stage. My plan is to navigate with my mobile phone (I’m bringing a spare one). The disadvantage of these GPX files is that it is 1 file per stage. This means you’ve got hundreds of files to work with which is not ideal on a phone. Also, if you want to import a GPX file in Google Maps you need to add it to a layer. You can have only 9 layers in a map you create. With hundreds of files you’ll have to create a lot of maps and that’s not ideal.
I’ve combined the GPX files per category/province, the same as the site has done in their map. Unfortunately for me I couldn’t find a tool to do this so I’ve done this manually. In 1 file you still can see the different stages like normal, but now you don’t need so many files.
For offline navigation I use the app maps.me. This app can’t handle GPX files so I’ve also converted the new created GPX file to KML files, thanks to this site.
I have used these files and it worked for me, when you use these files you are responsible for where you will hike, not me 🙂