But without any gps receiver (built in on your HTC or add on hardware) any gps software/application you have on your HTC wont point your current position on the map.If your HTC come w/o GPS feature which mean have NO internal gps receiver you need to add some things::
a> Bluetooth GPS receiver OR USB GPS receiver if your HTC has pc-like usb port,but i dont think so.
This is to capture satellites data position and then give it to the GPS software installed on your htc through bluetooth connection.This kinda like this http://www.semsons.com/bluetgpsrec.html
2> Navigation Software.
To proceed datas from receiver use to point the appropriate position on the map.This can be obtained by purchasing or search for free application like in here http://www.maps-gps-info.com/fgpfwmobile.html#Java
3> MAP.
You can use the map (purchased or downloaded) and stored in your device memory or Memory card ,or you can use onlie map like Google map or Google earth.But using online map will use internet connection of your device with either GPRS or 3G.And this is is your data plan obviously used for.