The gurgling sound is normal if the lines are not hooked up, and yes, fluid will come out when the knuckle is moved if one of the lines not installed. BTW, the power steering PUMP is on the motor (accessory on the motor), the steering gear mounts on the frame (only mentioning to not help eliminate my confusion.)
That gear looks like original equipment to me. It's probably fine for re-use, but it's not a bad idea to swap it. Kinda depends on if you'll be pissed off if and when you have to change it later.