"The Moscow government told the Moscow gay pride parade organizers on Tuesday that the Moscow authorities have authorized a gay pride parade in Moscow," Alexeyev said in a statement released in Moscow.
The organizers notified the Moscow government and the Moscow traffic police of their intention to hold a gay pride parade on April 12, he said.
The rally entitled "Moscow Gay Pride Parade: Homosexuality in the History of World Culture and Civilization" will take place on May 28, Alexeyev said.
The Moscow authorities have suggested reducing number of the rally participants to 500, which was done, he said.
"The purpose of the rally will be to provide society with objective information on the history of the attitude towards homosexuality in culture and science, on the contribution made by prominent gay people to culture and art, and role of prominent culture figures and artists in the protection of the lesbians, gays, bisexuals, and transsexuals," Alexeyev said.
The Moscow authorities have not authorized such rallies since 2006 and any attempts to hold a gay pride parade in Moscow have been curbed by the police.
"Gay pride parades were banned by the Moscow administration under Yury Luzhkov," Alexeyev said.