Hi,
If you mean the company that brought us the F-16 "Fighting Eagle", as well as Gulfstream aviation: They have a numberof sites on the web, but the main corporate listing is here:
http://www.gd.com/overview/corp_other/corporat.htm
Street addresses, email address of one or two individuals, and other corporate web site destinations here:
http://www.gd.com/overview/aerospace/Default.htm
http://www.gd.com/
http://www.gd.com/overview/marine/Default.htm
You might also inquire with the Securities and Exchange Commission too:
http://www.sec.gov/
Filings by a company are public record, and those filings contain a wealth of information concerning holdings, pensions, corporate names, etc.
:I Have a pension through Stromberg-Carlson that was taken over by General Dynamics but am having problems claiming it due to their change of address and no forwarding addres. Can anyone help me??