It does not matter whether you use wifi or gsm, the men in black sunglasses and hoods can track you anyway.
All it takes is a nice piece of SW on your device, it does not matter what kind of encryption you use brcause he interception can be done before the encryption, and same goes for location determining.

Now, if you are as badly concerned about this as you sound, you should worry that your device is already compromised when you unbox a new device fresh from shop. After all, you did not make the HW chips or compile the SW on it yourself so it is hopeless to make sure it's not compromised. After all, you cannot be sure that the device manufacturer has not been pressurised by government.