GPS for Palm T3

[junior]

I'm working in the Caribbean and would like to add GPS capability to my T3 (if possible) without a nav (its useless here, unless someone can point me in the right direction). Does anyone know of any GPS software I can get without the NAV addition? I'm trying to run from a clutter of equipment, have too many already, I do alot of work out in the field and a GPS comes in handy at times. Thanks much