I saw a post from someone claiming to have a "GH gut" from only 5 IU's/day, but there were numerous requests for more specifics (i.e. dosing schedule, duration, other AAS use, training regimen, age, etc. etc.) and he didn't post a shred of info on those things.
I did read somewhere that GH can target visceral organs, particularly the large intestine, and make them grow. I'm 37, cycle AAS and do 2 IU's of hgh/day when off and 4-5 IU's/day when on. I'm constantly on the lookout (paranoid, even) for GH gut, but it's almost impossible for me to tell since I do experience some abdominal distention due to the sheer quantities of food you consume when on-cycle. You gotta feed Deca!