Are you sure you are using the correct trainer version, and the latest patch of Gods & Kings? Works fine on steam version for me on Windows 8 - so long as it is run as administrator.
p.s. I ws forced to buy G&K expansion just to keep the trainer working for this game :P (not CH's fault I should point out; check their posts) - let it not be said that CH doesn't help the gaming industry
All times are (GMT -08:00) Pacific Time (US & Canada). Current time is 6:30:04 PM