Once you have a G-2D gimbal on the X350 Pro, add this TX5803 FV Combo on the drone and you'll get real time video feeds, range around 300m, and you can increase the range by putting a Flat Panel antenna on the TV monitor side, that would give you around double the range.
This combo includes a TX5803 Video transmitter and the power cable, and a GoPro 3 cable, this is all you need for the Air side. For the ground side, you need a Video Receiver, which we recommend Boscam Dual Antenna Monitor, it is a Monitor with built-in receiver, simply turn on the Monitor and you'll get video, just like a TV.