[Plugin: XML Google Maps] template tags instead of shortcode possible?

Thank you very much for developing this plugin! Every thing works fine, but there is something I`m missing in the documentation

I’m using custom fields for different thinks, I want to use them also for the URL of the .gpx-files. Are there template tags (instead of shortcode), so that I can emmbed a map direct in a template?

<a href="http://example.com/my.gpx">[deltazoom=0;gpxelevationcolor=green;gpxspeedchart=show;gpxcheckpointinterval=5]</a>

http://example.com/my.gpx is in a custom field, and I need the rest of the code as template tags.

Thanks in advance and sorry for my bad english.