Thanks guys for the answers and explanation. I've never hiked with GPS but for this trip I will really need to start using this wikiloc tracking it seems.
The German camino trails in my area (Franconia) are maintained by the same hiking association that manages also the normal hiking trails in the Franconian Switzerland or the Franconian Alb. And it is really tough to get lost as the signs are marked usually very good - just sometimes early in the year when the trees have lost some pieces of barks in the month before, one or the other sign could be gone, until they get renewed. So hiking without this "luxury" of a well-marked path, it may make sense of checking these GPS tracks, I agree.