Well I've been using GH for a few years, and IGF-1 on and off for about a year. I also used slin for a while. I definitely don't have coleman gut or anything near it. It's just when I'm bulking and eating all the time I have a little protrusion in the upper gut (this will happen with a high dose test cycle as well). I wouldnt let it scare you off. I'm kind of on the extreme end of the spectrum. I'm 285 lbs, eat about 5-6000 calories year round (3000 on a cutter), and I'm planning on competing nationally in the coming years.
So since I'm always eating my insulin is constantly increased. I believe Macro said somewhere in another post that the upper belly bulge is insulin and androgen dependent. So, since I'm on 2 grams of AAS plus GH and IGF-1 and eating all the time, the immediate bulge is probably not related to the GH or IGF-1.