Yes. Whatever my children do with there sexual life is non of my business. It wouldn't define him as a person AT ALL. I mean all he does different is sleep with different people than most. Its no ones business.
If there was a test that could tell me if my son or daughter were to be gay I'd still have them, raise them to be decent, kind, strong willed and intelligent human beings and I'd be as proud as ever.
Would you have a black son? Or a redhead son? Or one missing a finger? Or a deaf one? What about one with Autism?
You love your family unconditionally, no matter what. If you're not strong enough to soldier through LIFE in general, no matter how they're born, then you shouldn't be having children at all.