Does GPS require Data?

[h311boy]

I have just installed the new altell rom and got the gps to work with the GPSTool, but every time i connect to gps it automatically connects to data. I do not have data plan so it will be very costly if this goes on. I tried to delete the connection but it keeps creating by it self. So instead of #777 i put 1 so it does not connect to data, but now the GPSTool always asks for internet. Please explain to me if GPS requires internet and if no, what programs can use GPS without internet.

ps: it doesn't make sence that if you buy a external gps u don't need internet, and if its internal u do. any reply is much appreciated.