Arduino with GSM GPRS GPS Shield

i'm doing a project to identify the international maritime boundary line (IMBL ) with the aid of GPS and GSM. there is an alarm which buzzer when the vessel is 500 meters away from the border.If they ignore it and cross the line then the alarm will buzzer continuously. And the same-time a message will be sent to the costal guards through GSM.

Are there any arduino products available to build this system? if so, pls send me all the details including prices. thank you.