[CentOS] GPX files

I have a Garmin 78s marine GPS receiver and it stores tracks in GPX
format.  This is an XML encoded set of points giving longitude,
latitude, time and sea depth.  Garmin support viewing this via their
Garmin Express product, but there only seem to be Windows and Mac
versions.  I've emailed them and await a reply.  In the mean time, does
anyone know of any Linux products that will emable me to view track data
on a decent sized screen?  I don't want to re-invent the wheel by coding
up a hack myself.

Thanks,
Martin

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