One cannot answer the question "When did Gorbachev rule?" in the same vein as "When did Peter the Great rule" or "When did Stalin rule?" Mikhail Gorbachev was neither a monarch nor a dictator. There is an article on Wiki Answers, answering the question "When did Gorbachev become the leader of the Soviet Union?", see link below.
That said, Mikhail Gorbachev was in power from March 1985, when he became the General Secretary, until December 1991, when Soviet Union ceased to exist.
No, Mikhail Gorbachev is not single.
That'd be Gorbachev; Mikhail Gorbachev.
He led from 1988 - 1991 - Check out the link below
He "ruled" the Soviet Union. (Russia, Ukraine etc)
Mikhail Gorbachev.
Mikhail Gorbachev's birth name is Gorbachyov, Mikhail Sergeyevich.
Mikhail Gorbachev
Mikhail Gorbachev was born on March 2, 1931.
His full name was Mikhail Sergeyevich Gorbachev.
Mikhail Gorbachev was born on March 2, 1931.
Mikhail Gorbachev married to Raisa Gorbacheva in 1953
Mikhail Gorbachev was born on March 2, 1931