No no, you're talking exports. GDP is simly a sum of money that exchanges hands in a country in a year. If you went into a forest, chopped some wood, and built yourself a house, it wouldn't affect the GDP. But if you sold that house, it would. The number you'd sell it for would go into GDP.

It would also affect GDP if:

- you legally hired a worker and paid him wage

- legally bought materials or instruments

- etc.