Yes. GPX format is supported for waypoints and tracks, for both import and export. Waypoints can be imported in www.geocaching.com .LOC format and there is support for Pocket Query .GPX files. Arc Shape files can be imported for use as tracks and waypoints. You can import and save tracks and waypoints in Google KML format. The Topo/NZ Help sets out the data format for the tab delimited text file that you can to use.
Alternatively you can use the GPSBabel to convert between a wide range of formats.