California ranks first in GDP among US states, placing it at the 1×1 pole position within the G8x8 territories. In 2016, California took a share of 14.1% of the USA total GDP. This was worth $2,602,672 million or 2.6 trillion US Dollars, just as much as the GDP of the United Kingdom (ranking 5th among countries).
The official California website promoting international trade and investment is found at http://www.businessportal.ca.gov. Their address is
1325 J St., Suite 1800
Sacramento, CA 95814
And their telephone: +1 877 345-4633