Toshakhana is a repository in Pakistan where presents handed to government officials from foreign officials are kept and then sold to the officials who pay a specific percentage of the actual amount.
The PTI said the Accountability Court also disqualified both Khan and his wife for 10 years from holding any public office and also imposed a fine of 787 million rupees (2.8 million U.S. dollars) each.
In August last year, Khan was arrested and sent to jail after a local court in Islamabad sentenced Khan to three-year imprisonment for hiding his financial assets.
On Tuesday, a special court established under the Official Secrets Act sentenced Khan and former foreign minister Shah Mehmood Qureshi to 10 years in prison for the breach of state secrets.