Gov File Extension
Gov extension is associated with Goverment web pages. You can try to open these files internet explorer, safari or firefox.
Gov stands for web page extension. Generally this extension is used for goverment web pages. Ministry or governors web pages end up with gov extension. Gov is derived from goverment word. Anyone can not get this web page easily.
Regular web sites are like this: www.page.com
Goverment web sites are like this: www.page.gov
You may open these pages any browser such as internet explorer, firefox or safari.
If you want to buy a domain like GOV you can try "domain name seller" keyword from google.
What needed to Open Gov file extensions.
Links about Gov file extension