I started with it but soon I found out that it will be quite the task If no one has it I'll probably give it a shot.
THEMA: E1 trail in a Google Maps file
You can import the .gpx files and export them the google.
I've also converted them to KML files. For offline navigation I use the app maps.me. That app can't work with GPX files.
The next section will be:
|01.01||Hattir Ost - Duolbajarcopma||34,2|
|01.02||Duolbajarcopma - Bastingammen||21,4||484 - 484|
|01.03||Bastingammen - Rukkujavri||22,9||488 - 402|
|01.04||Rukkujavri - Bojobeaskihytta||19||328 - 312|
|01.05||Bojobeaskihytta - Mollesjohka Fjellstue||34,8||1592 - 1595|
|01.06||Mollesjohka Fjellstue - Ragesluoppal||18,3||1107 - 1111|
|01.07||Ragesluoppal - Masi||30,4||1506 - 1559|
I'm also using the phone with gaiagps app. Al files and maps can I download so the phone stays in airplane mode.
As backup I have the Garmin Fenix and a DeLorme with me.
With the Garmin Basecamp software you can export each sections with POI to one single file. Than I uploaded it to gaiagps site. The app synced it back to my phone.