It said the action had been taken on the grounds of national security.
President Tayyip Erdogan accuses Mr Gulen of instigating a failed coup against him last July - a charge the cleric denies.
Earlier, authorities detained more than 1000 people in the latest operation against alleged Gulen supporters.
The nationwide sweep was one of the largest such operations carried out in Turkey in months.
Interior Minister Suleyman Soylu said it had targeted a Gulen network "that infiltrated our police force, called 'secret imams'".
