What is the only country that has won a gold medal at every Summer Olympics?

The only country to have won at least one gold medal at every Summer Olympic Games is Great Britain, ranging from one gold in 1904, 1952 and 1996 to fifty-six golds in 1908.

https://en.wikipedia.org/wiki/Summer_Olympic_Games

Not to be traitorous to my country, but it does help that Briatin has never boycotted an Olympics for political reasons. The sporting giants Russia and United States, however, have, and that goes somewhere to explaining why they haven't won got gold at every Olympics. They weren't there!

See more about the Soviet-led boycott of Los Angeles 1984 here -

https://en.wikipedia.org/wiki/1984_Summer_Olympics_boycott

And the earlier US-led bocott of Moscow 1980 here -

https://en.wikipedia.org/wiki/American-led_boycott_of_the_1980_Summer_Olympics