It is not that simple.

You need to setup the GPRS modem according to its specific AT commands. Either on a terminal or through your PIC controller.

Then you have to open a "channel" to a Static IP address since the Mobile Network ususally provides Dynamic IPs.

Because I founded a bit difficult, I preffered the solution of a ready GPRS bridge to Serial: the WirelessCOM from Teltonika (www.teltonika.com).

You only have to set up easily through a Terminal and then whenever you write even a single byte on the serial port, it establishes automatically a connection to the programmed IP and sends the data. Like Serial to serial communication.

Ioannis