I have written a first ebuild for the gpstools written by Oliver Lau.
It includes the wpl1000reader that can be used to read the gpx-tracks
from the Wintec WPL-1000 Showily and the Navilock NL-456DL EASY LOGGER.
Created attachment 193194 [details]
first ebuild, quick'n dirty
It actually does not build on current gentoo stable at all, so we can't package it.
Try to use various other gps-comunicating packages like gpsd/foxtrot/... if they provide the required features...
Sorry that none took a look on your bug earlier. :-/