not that I know - but GPX is a file in XML format, it's easy to open them up and concatenate them using say Notepad++ (free text editor)
WANT TO BUY - KTM 950/990 ADV or SE - Projects, issues, cosmetic damage very welcome.
Possibly considering a BMW F800GS
Yamaha Majesty '08
KTM 690 Enduro '10