Peel the eggs and half them lengthwise. Scoop the yolks into a bowl.

Add mayonnaise, gin, olive brine, garlic powder, salt, and pepper to the bowl with the yolks and mash until smooth.

Stir in the chopped olives and parsley. Taste and adjust seasoning as needed.

Spoon or pipe the yolk mixture back into the egg whites. Garnish with a green olive and a sprinkle of black pepper.