First Appearance: Incredible Hulk # 1 and then gradually turned green and stayed green until issue #324, which is considered the first "official" appearance of the Grey Hulk. 
Height: 6'6" 
Weight: 900 lb. 
 
 Scaled Performance Evaluation

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Basic Characteristics:  Of the three dominant Hulk entities the Grey Hulk is probably the most cunning and twisted.  The Savage Hulk acts from rage but the Grey Hulk will mentally pit Banner's subconscious against himself and play mind games with Banner and the Savage Hulk.  The Professor doesn't easily fall victim to the Grey Hulk's mind games and has none of the emotional strings to pull on that Banner has.  Known as "Joe Fixit" most of his existence, he was a bouncer and job guy in Vegas.  The Grey Hulk came about when an attempt to separate Banner from the Hulk failed and was also intentionally botched by "Thunderbolt" Ross.  These actions splintered Banners subconscious producing the many different entities of the Hulk with the Grey Hulk taking the dominant role after the incident.  The Grey Hulk was an average intelligence and used his cunning mind to get whatever he wanted and when that didn't work well The Hulk did what Hulk does best and that is Hulk smashed.