Getting GPS data of a remote mobile

I'm developing a mobile app, somekind of a social networking thing. There I'm planning to intergrate a Location searching facilty to users. Can anyone tell me is it possible to track the gps data of a remote mobile programa开发者_开发问答tically(in j2ME specialy)? I'm preffer to doing this data transfer through GSM or HSDPA. I found import javax.microedition.location.*; to get location based data. What I want toknow is, is it possible to get those data of another remote mobile? Thanks