Idea: Google Timeline Import

How about a way to import the Google Timeline ? I Tried to convert my 120MB(5Year) Google Timeline from KLM to GPX and importing it to PhoneTrack. It can be downloaded via: https://takeout.google.com/settings/takeout Unfortunally PhoneTrack uses an incompatible GPX Structure i suppose. When loading from that GPX, an empty record gets created.

Any Ideas how one can "Import" the Google Timeline ?

Thaks for any suggestions. Regards Florian