There are lots of resources that you can use to find popular information about a country such as their Gross Domestic Product (GDP).

To begin your search, try going to Data subpage of the World Bank website where you can search data sets by country, topic, indicators and more.

To find a range of GDP information, go to the 'Indicator' link under the search box.

You'll find GDP information is contained mostly under the 'Economy & Growth' heading. You may download the information on the indicator web page by clicking the Download Data button beside it. Your library may also have useful databases to explore.