DOES EL SALVADOR IN CENTRAL AMERICA SUPPORT THIS IPAD

What do you mean by doe sort support the iPad?

Do you mean: Are there cellular service providers that can support the iPad for cellular service?

Do you mean: Are there Apple service and repair centers in el Salvador?

Do you mean: can you plug in and charger an iPad in el Salvador?

What kind of support are you looking for?

Not officially: link-> Wireless carrier support and features for iPad in Latin America and the Caribbean - Apple Support

However, you can try an iPhone SIM card from a carrier and see if it works.