.gov is for "Government" which is a Generic Top Level Domain (gTLD) - Not associated with a country. However, registrants are limited to USA.
Root: ICANN
Registration web site: http://www.nic.gov/
Whois server: whois.nic.gov
Whois web interface: http://www.nic.gov/cgi-bin/whois
Second Level Domains Registered
Notes: General Services Administrations operates domain. See the GSA policy for .gov.
Domain Registration Rules:
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