Ang, that link doesn't work.
I'm not advertising for GG, I'm just posting what they had on their website.  I thought it used to say he was in the Guiness Book, but couldn't find it when I was looking. After hearing what has been going on with them, I certainly wouldn't adopt from them now.
As far as the weight goes, I have a better time believing the 295 lbs only b/c Avalanche is built so stocky. Gibson is at least 6 in taller than the average dane, yet is only about 20 lbs heavier? Even though he is built leaner. He sure is a handsome fella though.