agree with @Allhyundaicars even I came across with some systems regarding this. If your car is opened with something else instead of the key the system will automatically send you a text message regarding it. The system will even keep tracking your car.
You might want to consider installing anti-theft alarm as a first step to prevent theft if the car does not already comes equipped with one. Steering locks / Gear locks though seem to be insignificant but are useful. Yes, another option is to install a car-tracking device from brands like MicroVBB or Map My India. Please refer to this link for a quick guide to secure the car from theft: http://www.theautomotiveindia.com/f...2998-securing-your-car-theft-tips-tricks.html
if you occasionally hire drivers from different agencies or references and since its a different driver each time you are nor sure if you can trust, so in such case is there any GPS tracking you can fix on your vehicle & check where all it has been or is currently and also lock down the vehicle remotely if there is such a need? Is there any such system available. I know these days private buses and school buses especially are GPS tracked. But this is for a single private vehicle. if you know any company which sells such a system or provides such a service please suggest. thanks