1. British Citizens: British citizens do not need a passport to travel to Gibraltar. They can use a valid UK photo ID, such as a driver's license or national identity card.
2. EU/EEA Citizens: Citizens of European Union (EU) member states and European Economic Area (EEA) countries do not need a passport to visit Gibraltar. They can use their national identity card or a valid passport.
3. Non-EU/EEA Citizens: Most non-EU/EEA nationals require a valid passport to enter Gibraltar. Some nationalities may also need a visa, depending on the length and purpose of their stay.
4. Citizens of Certain Countries with Visa-Exemption Agreements: Citizens of certain countries have visa-exemption agreements with Gibraltar and can enter without a visa for short stays for tourism or business purposes. The specific visa-exemption requirements vary by country.
5. Gibraltar Residency: If you are a resident of Gibraltar, you will need a valid Gibraltar residency card or other proof of residency.
6. Visa Requirements: Some non-EU/EEA citizens may need to obtain a visa prior to traveling to Gibraltar. Visa requirements vary depending on your nationality and the length and purpose of your stay.
It's important to check the latest travel advice from the Gibraltar government or contact the nearest Gibraltar embassy or consulate to confirm the passport and visa requirements for your specific situation before you travel.