I have never heard of any gyno case while using Superdrol. It is always within PCT, shortly after PCT, or even a month to a few months after PCT.
Water retention on SD is a bit different than water retention on Test. Water retention due to high estrogen levels from Test has a bloated look while water retention on SD has a very hard and tight look. I don't think you should be worried about bloat on SD. My muscles look fuller, tighter, and bigger on SD.
Do not use an AI with this cycle. It is not needed whatsoever and it could become a problem with joints and lipids already being in a rough state on SD/Epi as it is.