I personally think he's hilarious. He cant stop turning his head and waving his hands when talking to a camera though lol.
Search YouTube for "boiling Point"
Amazing fly on the wall stuff.
A lot of what you see on the TV is fake and Gordon is no different. My dad got to speak to Michal Roux Jr at one of his restaurants the other week and he admitted as much.
Gordon isn't that different from most of head chef's in country expect that he's exceptionally more talented then most and having 3 michelin star reputation makes him understandably insecure hence why he gets upset when things go wrong.
Seriously, watch Boiling Point, it is an eye opener.
Seriously, watch Boiling Point, it is an eye opener.

I was going to add that the only show where I've seen him appear genuine is Boiling point.