Both of ours, Bogie Carter and Bubba (ATB), were neutered. They were both out of a show kennel, and when the breeder let's her hounds go for pets you must agree to have them neutered, which we did. Bubba was eight months when we got him and had him neutered a month later. Bogie was ten months when we got him, and he was neutered at eleven months. Our vet wanted to give them time to bond with us and settle in before she neutered them. Both of them did great, the only problem was keeping them inactive for a couple of days. Thank goodness for the crate.
Bogie has a wonderful temperment, has never humped, and is a wonderful companion, as was Bubba.
Our neighbors down the street have a male German Shorthaired Pointer entact male, who is forever getting out when the other neighbors down the street who have female Labs that go into heat. I would say neuter, plus you will never have to worry about testicular cancer or having a frustrated male on the hunt.