Most countries do not need a visa.
Visas are required by passport holders from Afghanistan, Argentina, Brazil, China, Colombia, Costa Rica, El Salvador, Georgia, Guatemala, Iran, Iraq, Israel, Japan, Jordan, Kuwait, Kyrgyzstan, Lebanon, Marshall Islands, Mexico, Mongolia, Myanmar, Nicaragua, Oman, Palestine, Panama, Paraguay, Peru, Qatar, Saudi Arabia, Thailand Syria, United States, Uruguay, Vietnam and Yemen.
Visa Requirements and embassies
Gambia embassy