GDP
Gross Domestic Product is an economic indicator that tracks the changes in the total value of goods and services produced by a country. It represents the total value of a country's output, income or expenditure produced within the country's physical borders.
GNP
Gross National Product is the Gross domestic product plus income earned from investment or work abroad.
GTC
Good- till- cancelled is an order left with a Dealer to buy or sell at a fixed price. The GTC will remain in place until executed or cancelled.
Guppy
The market nickname for the GBP/JPY currency pair.