Santos announced last week that the 22-year-old Brazilian international was free to leave the club.
However, the attacking midfielder has now sought to clear up his transfer situation on Twitter.
"Today, my future is at Santos," he tweeted. "I have a contract until 2015, and right now I am focused on winning the Gold at the Olympic Games for the Selecao."
Ganso signed his first professional contract with Santos in 2008.