http://shrigley.com/source_code_archive/

https://archive.org/details/shrigleysource

Gargoyles Prototype / Test (SNES) Project Archive contains two prototypes(actually three)

GG.ROM: 7-19-1994

GGDEMO.CPE: 9-26-1994, This is a Psy-Q format rom which requires modifications to convert to SNES. Seems to have more level art from a quick check with a tile viewer/editor.

GG.TXT: 4-6-1994, This contains a listing of compiled code, some data, and raw source code from an older proto.