I was given this drone

It says on the bottom model #01735 And there are two of them, one for parts. However the controller was lost. Which controllers will work on it? Is there a better controller, worse one? I dont plan doing much of any type of modifications other than fly it and probably crash it. Also I see some say GPS, what is that referring to? Can these be programmed to fly with GPS coordinates? Also I was given a Blackfin 720 VR camera he says goes with it?