Compute net foreign investment:
Net Investment = Earnings - Payments
Looking at the data, we find earnings on foreign investments is 75 billion G and foreign earnings on Amagre investment is 25 billion G.
Hence:
Net Foreign Investment = 75,000,000,000 - 25,000,000,000 = 50,000,000,000 G

Compute net exports:
Net exports= Exports - Imports
Looking at the data, we find exports 50 billion G and imports 150 billion G
Hence:
Net exports = 50,000,000,000 - 150,000,000,000 = -100,000,000,000 G

Compute GDP:
GDP = Consumption + Government Expenses + Investment + Exports - Imports
Looking at the data, we find consumption is 300 billion G, government expenses are 200 billion g, Investment is 100 billion g, exports 50 billion G and imports 150 billion G
Hence:
GDP = 300,000,000,000 + 200,000,000,000 + 100,000,000,000 + 50,000,000,000 - 150,000,000,000 = 550,000,000,000 G

Compute GNP:
GNP =  GDP + net foreign investment
Looking at the data, we find GDP is 550,000,000,000 billion g and net foreign investment is 50,000,000,000 billion g
Hence:
GNP = 550,000,000,000 + 50,000,000,000  = 600,000,000,000 G