Oh goodness! I assume the question was asked in jest, but since I've been asked that in perfect seriousness before, let me just cover all the bases.
No, I have not met the Griffins. They are fictional.

No, Quahog is not a real place (it's a type of clam).
No, you do not get all of the jokes in
Family Guy and it is much funnier if you live here.
And thank you for getting that quote for me.

I love talking to the griffin in QfG2, it makes me happy. So... I made it my signature!
