I've pheasant hunted behind 2 great gun dogs in my life. The best was a female yellow lab. The other one was a female german shorthair. Both those dogs had the great love for people and love for hunting coupled with super instincts and training. Have hunted behind lots of other labs, brittanies and springers, as well as a couple other GSPs but nothing that approached those 2. My Dad owned the yellow lab and a friend owned the GSP. I'm not sure I'd want either breed in the house though. Most GSPs are tall enough to eat right off the table (though that favorite of mine was smaller) and the labs have a tail that can sweep everything off a coffee table in a heartbeat. Anyway, I don't know of any GSP breeders and haven't pheasant hunted seriously in 20 years. Good luck, I would recommend a female.
George