Would probably take a bit of coding, but I think it would be awesome. Gorgon's due for a rework anyway.
Step 3 - recode the statues that IMAWAL creates to be PHYS and MAG immune monsters with 0 damage that can only be targeted with ENDISWALL and heores with the Death Gatze ability. And possibly PISSORF.
Step 2 - Start the Gorgon off with IMAWAL instead of ENDISWALL, and have the statues she naturally creates contain the 1 gold. Let her be able to dispose of the statues she makes naturaly through death gaze, and thus gain a +1 gold per kill. The IMAWAL would help her level to take easier advantage of her poison, and the gold can help towards buying conversion fodder for the death gaze or fueling gold-intensive items.
Step 3 - Possibly adjust her damage penalty to take the new poison into account.
*Step 4) If it would save you the trouble, you could probably simply make her death gaze ignore resistances and leave her attack penalty the way it is. She'd be able to attack statues and have an awesome niche...
Et voila, a bit of work, but you have a workable and powerfull class, as well as possible new interactions with statues. Adding +1 gold to the statues when she petrifies stuff wouldn't hurt anyway...