The reason that Gou'ld are megalomaniacs is because they are spawned with the complete knowledge that the parent managed to assume over years of forcibly subjugating and mind-raping hosts.

This would indicate that they would come with some serious bonuses to Knowledge [Technology] or whatever, along with at least one craft score. It probably wouldn't be entirely unfair to have Gou'ld be insane as per the Madness ability [-6 Wis, +6 Cha, use Cha on Will saves], given their unhinged self belief and unwillingness to accept anyone acting without their say so.

I'd probably make the Knowledge bonus +8 or something, given that actual study yielded far smarter individuals [Anubis, Nrrti and Romulus (I think he was the one with the growth accelerator...) in particular].

The Fast Healing seems higher than that demonstrated in the series, which was more like 2ish, but i can see roughly why you made it so high given the massacre that is the average optimised encounter.