No such thing as "GH gut".
Yes there is. Excessive amounts of HGH make all the internal organs and intestines grow..the problem may be compounded by insulin but it is caused primarily by GH. Hence why the problem has reached epidemic proportions as the use of GH has become more prevalent.
They've performed autopsies on abusers of GH and their hearts, livers, intestines, everything, have been enlarged. It's proven beyond doubt that it does it...along with a lot else like cause abnormal bone growth and diabetes - leading to insulin problems.