IrishSights said:The one for the phantom does not come with GCU as its built in other does. Otherwise they are the same
Edit: That is built-in to the phantom
CityZen said:Only a non-upgraded Phantom 1 or a non-Phantom will need the external GCU. Any Phantom 2 will not need the external GCU, since it has one built in.
If you get the gimbal with the GCU, you will have an extra part laying around when done.