Why do they want a dog? That's the first question. Do they want it as a herding, working dog?
Do they want a guard dog?
Do they want it as a companion?
Do they just think it's a nice idea - a farm should have a dog?
Do they want it as a playmate for the child?

I forget - what part of the US do you live in?
A dog that would appropriate for an "outdoor" dog inMaine is diffent that Miami.

Why do they want it to be an "outdoor" dog. And do you mean an all-the-time outdoors dog, or an outdoors during trhe day, sleeps inside at night?

And as nicely as the GP fits some of your criteria, every GPyr I've known wants love, most of all.

And most important, it sounds like they are NOT ready for a puppy (they want calm, they want to not have to do much training), so an adult dog might be a better choice for them.