Abstract: A GPS based controlled tracking and monitoring system. A geo-fab transceiver device is connected with a GPS device. The user keeps a detached geo-fab transmitter. When the transceiver does not receive signals from the detached radio frequency transmitter, it sends an activation signal to the GPS to create a radius of the location for determining an “away” status. When a GPS attached object moves outside the boundary of the radius, alarm messages are sent to the user, and positioning information are constantly sent to a central server for the user's accessing through the internet. The user can send an automated email to a police from his/her online account.