The initiative was taken at the First Our Americas Forum, which concluded on Sunday in Ottawa.
The letter was passed as a resolution agreed during the meeting, Arnold August, a member of the International Committee for the Freedom of the Cuban Five, told Prensa Latina.
The document, supported by participants from Vancouver, Toronto, Ottawa, and Montreal, considers unfair and a risk to Rene's life the court's decision to maintain him on supervised release on US territory for another three years.
Gonzalez was released on October 7 from a prison in the city of Marianna, northern Florida, after serving a harsh sentence since December 2001.
The letter asks Obama to immediately send Rene back to Cuba and free the other four anti-terrorist Cuban fighters: Gerardo Hernandez, Ramon Labanino, Antonio Guerrero and Fernando Gonzalez. - Prensa Latina.