Explanation:
In order to understand why a country having a GDP greater than its GNP implies a trade deficit, we need to break down the concepts of GDP and GNP.

GDP (Gross Domestic Product):
- GDP measures the total value of all goods and services produced within a country's borders in a specific period of time.
- It includes both domestic and foreign production within the country.

GNP (Gross National Product):
- GNP measures the total value of all goods and services produced by a country's residents, regardless of where they are located.
- It includes the income earned by a country's residents from foreign sources, as well as the income earned by foreigners within the country.

Implication of GDP greater than GNP:
- When a country's GDP is greater than its GNP, it means that the country is earning more income from production within its borders than from production by its residents abroad.
- This could indicate that the country is importing more goods and services than it is exporting, leading to a trade deficit.
- A trade deficit occurs when a country's imports exceed its exports, resulting in a negative balance of trade.
In conclusion, if a country's GDP is greater than its GNP, it implies that the country may have a trade deficit due to importing more than it is exporting.