I'm not surprised the fine sword is a common prep (allthough I find prepping stuff you can easily find in the shops always a bit strange, but wth). Elven boots are actually easy to find and locker - kill the Zombie in the subdungeon and there you go. Seeing it lower than Hero's Helm is actually really weird for me.
Seeing GG so high probably has to to with how easy it is to gain piety with him, and that his punishment is actually avoided rather easily. Avoiding his punishment also leads to getting piety with him (convert everything he doesn't like) and, well, I can sort of see why he's popular. Oh, and he has the "go through physical immunity" boon, which probably gets him prepped a lot.
What I find a bit strange is the relative lack of Binlor worship compared to the overwhelming Taurog worship.