Just like some of the previous games, you can unlock the golden camo for your weapons in Call of Duty: Black Ops 2.
Gold camo has to be unlocked for each individual weapon, so you’ll have to complete this list for each individual weapon you want to unlock it for.
These have to be done in order, because you won’t have access to them until the previous one is unlocked.
Tip: To help you with the attachments and perk challenges, I would equip wildcards when you’re doing these. For example, when running with no attachments, use wildcards to equip more perks. When running with no perks, use wildcards to attach more attachments, etc.
Want something even more extravagant? Check out my other article if you want to unlock Diamond Camo in Black Ops 2.