Step 1: Connections
Also Attach the GSM antenna ti the board.
Also since we are using the GPS module, connect the GPS antenna as well
NOTE: The antenna connectors are extremely delicate, handle them carefully
Step 2: Calculations
Also we use the circle equations to find the locas of all the points within the radius at any particular centre.
Step 3: Code
Now, in the loop, replace YOUR_NUMBER with the cell phone number to be notified.
Step 4: Compile, Run
Keep the antenna of the board in an open space so that to increase precision and accuracy.
Keep radius as large as possible (possibly in km) so that the round offs in the calculations is compensated for