Transform your gpx to a breadcrumb of POI's
Use GPX2OV2 to convert your GPX waypoints to TomTom POIs, or convert a GPX track into a breadcrumb trail of TomTom POIs so you can still navigate off-road. (TomTom only shows ‘known roads’, so you can’t navigate off-road. However, POIs can be displayed everywhere and can be used to create a breadcrumb trail to follow while riding.)
There are many reasons to prefer a TomTom over Garmin, expecially of you use it mainly onroad, but it sucks if you want it offroad (or on a route with parts that are offroad).
The TomTom Rider navigation maps .gpx files to existing roads on the TomTom map. This means most non-tarmac road are ignored, because they are not known for TomTom as roads and the TomTom forces you to take a big de-tour to get a closed to the original track.
Navigating turn-by-turn in offroad terrain is in most cases not possible anyway, but just showing a line on your navigation device would be very helpfull to give some directions.
Even that's not possible on the TomTom, but there is work around: A breadcrumb with POI's!
Navigating on road with POI's can be annoying, so I'll use it only for the offroad parts and combine it with a normal TomTom route. The good part of TomTom is that it is very easy in 'picking up' your route again once your returning from the offroad part (it will create a big detour for your offroad part, but you just need to ignore that). The start of a row of POI's on your TomTom is the signal to use POI navigation and once the POI's ends, normal navigation takes over again. Creating mixed navigation requires two things: A TomTom route and multiple breadcrumbs with POI's.
Warning: The map TomTom uses on the device and TomTom Mydrive may differ! Always check you route on your device as wel!
Any ideas? Contact me!