Here is a Beta for the Enhanced Edition version of the original Geomantic Sorceror Kit by Caedwyr. It is meant to be played on either of BG1EE or BG2EE. The GS is a Sorceror with some Druidic powers.
Original BG1 lacks the Sorceror class, so the Kit can't be added to this game.
Baldurs Gate Trilogy would be a different matter I imagine.
Edit:
Every time I tried to download the Attached file the download failed to complete!
It is like nothing I have ever seen here at Ironworks. So here is a direct link:
Geomantic Sorceror Kit Download