The listing for Ghoul Touch says there’s a save: “Fort neg”. The text reads, “Imbuing you with negative energy, this spell allows you to paralyze a single living humanoid for the duration of the spell with a successful melee touch attack. A paralyzed subject exudes a carrion stench that causes all living creatures (except you) in a 10-foot-radius spread to become sickened (Fortitude negates). A neutralize poison spell removes the effect from a sickened creature, and creatures immune to poison are unaffected by the stench. This is a poison effect.”
Does the spell grant a fortitude save to negate against the paralysis, or is it just against the sickening stench?
This is a multi-step process. You cast the spell. Now you must make a melee touch attack. If that touch attack succeeds, the touched target must make a Fort save. If that save is successful, all effects are negated. If that save was failed, the target is paralyzed AND exudes a stench. All living creatures (except the caster) in the 10 radius spread make a fort save of their own. Failure of this save means these creatures (secondary targets ?) are sickened.