I can't tell you about taking gh, as i plan to start this coming spring. But i have been taking mk677 for close to four months, and rolled in some cjc1295 about a month ago. I definitely get water bloated, and for me its all diet related.
Buddy and i had a super great back and bi day, so we decided to treat ourselves Lee Priest style.... bucket of KFC baby. Eat to grow! Needless to say, the days after i felt like a water buffalo.