If you need to power more than 1 device, I suggest to use the auxiliary power wires:you can grab these wires with tweezeers and they come out for some centimeters, sufficient to apply a connector for an easy parallel power to your devices. If you use this solution, you can drive the pitch of your gimbal using just 1 wire from the Naza F2 port(the signal wire) and forget about the positive and ground. I follow this solution on my P1.1.1 and works perfectly. If you do not use the auxiliary power,you can drive the pitch and power the gimbal using the 3 wires of the Naza F2 port, as Unicyclejunkie suggest, but then you have to put in parallel the other devices you need (e.g. the FPV transmitter), with the risk to overload the F2 port.