6 gpm is not alot for sprinklers. I have 9-10 gpm out of my well and thats barely enough to work 3 sprinkler rotors at 3 gpm each for my 1/2 acre front/side/back lawn.
Whatever you do, if you are running it 200 yards, use a minimum 1" pvc. Any smaller, and you will have some major PSI and gpm loss. 200 yards is a LONG run for low pressure/gpm.
Do you have a well or city water? Do you know your mainline size and PSI rating? For that much of a run, you want all the flow you can get.
I'm no expert..........YET!
I just like to suggest things and learn...
See what the pro's have to say first.