Tracking one Nrf24l01 by another
You have to divide this project in separate steps:


Use a GPS to get the coordinates
Send the GPS coordinates via the nRF24L01 to the 'controller' 


Possible limitations:


GPS only works outside; otherwise use gyro/compass etc as addition
Range limitations
Power limitations


If you don't want to use GPS, you might be able to use 2 nRF24L01s which send a signal at exactly the same time, track it with a third one (attached to the object), calculate the difference in times and based on that calculate the distance to both other nRF's and calculate the position. You might even need a third sender.

Of course this is quite tricky, like synchronization of time between messages and the need for multiple nRF's, also at different distances/directions to be reliable.