A:Answer Hey there,
Thanks for posting this question. You can indeed upload GPX files onto this device. I have added some steps below to show how to do this -
http://download.tomtom.com/open/manuals/VIA_53/html/en-gb/ImportingatrackGPXfile-MyDrive-CONNECTEDandNOTCONNECTED.htm
I hope this helps,
Reiss @ TomTom