A gender-neutral term for a person who serves food and drinks in a restaurant or similar setting. Less common than ウェイター/ウェイトレス in casual contexts, but used in formal or written descriptions.
At that restaurant, the waiter carefully brought the dishes to us.
Female equivalent of ウェイター. 給仕人 covers both genders without specifying.
Compound of 給仕 (kyūji, 'serving meals') and 人 (nin, 'person'). The exact historical derivation is uncertain, but the term is conventionally associated with food service roles.