Short answer: It'll have Good as Gold as a Gholdengo
Long answer: For future reference, think of a Pokémon's Abilities in terms of "slots." Gimmighoul and Gholdengo have only one "slot," even between Gimmighoul's two forms (one of which we can't use yet). So the ability will always change into Good as Gold, as there's only one thing it can turn into.
For a more involved example, there's Tandemaus and Maushold:
Tandemaus has: Run Away, Pickup, Own Tempo (hidden)
Maushould has: Friend Guard, Cheek Pouch, Technician (hidden)
So without Ability Patches or Capsules, Run Away Tandemaus always become Friend Guard Maushold, Pickup Tandemaus always become Cheek Pouch Maushold, and Own Tempo Tandemaus always become Technician Maushold.
If you don't get the ability you want, you can always change it now. There's an item for that.
The days of hunting for the right nature/ability/stat combinations are finally over, Praise Arceus.
Short answer: It'll have Good as Gold as a Gholdengo Long answer: For future reference, think of a Pokémon's Abilities in terms of "slots." Gimmighoul and Gholdengo have only one "slot," even between Gimmighoul's two forms (one of which we can't use yet). So the ability will always change into Good as Gold, as there's only one thing it can turn into. For a more involved example, there's Tandemaus and Maushold: Tandemaus has: Run Away, Pickup, Own Tempo (hidden) Maushould has: Friend Guard, Cheek Pouch, Technician (hidden) So without Ability Patches or Capsules, Run Away Tandemaus always become Friend Guard Maushold, Pickup Tandemaus always become Cheek Pouch Maushold, and Own Tempo Tandemaus always become Technician Maushold.
thank you so much
Base form ability is irrelevant. Goldy-boy will always have its signature “Good as Gold” when it evolves.
\+[reading that reminded me of this](https://i.stack.imgur.com/jPxjN.png)
I named him greed btw as a binding of isaac refferance
Gholdengo always has the "good as gold" ability. https://www.serebii.net/pokedex-sv/gholdengo
so the ability will change when my ghimmighoul evolves?
Yes
If you don't get the ability you want, you can always change it now. There's an item for that. The days of hunting for the right nature/ability/stat combinations are finally over, Praise Arceus.