Sorry, I can't help you. I banned Gethaena from my Shadow World baseline. I mean, even the Underdark is (much) more integrated in the Forgotten Realms that Gethaena is in Shadow World. It was published at a time when the "common reference" for Shadow World (editorial work) was basically reduced to "sure, go ahead, as long as it's vaguely fantasy and not porn". It was better than The Shade of the Sinking Plain, but that a pretty low bar to beat.
Mind you, I don't consider Sky Giants of the Brass Stair nor Journey to the Magic Isle canon either, and tend to view most adventure modules quite dimly (Vog Mur excepted). So YMMV, and all that.