Final answer:
The generic top-level domain (gTLD) for the United Nations is .int, which is designated for international organizations.
Step-by-step explanation:
The generic top-level domain (gTLD) for the United Nations is .int. This gTLD is used for international organizations, and the United Nations, being a foremost international entity with the purpose of maintaining international peace and security, fits within this category. The United Nations was founded in 1945 and currently consists of 193 member states, working towards goals such as protecting human rights, delivering humanitarian aid, promoting sustainable development, and upholding international law.