Siad, 29, was arrested during the Project Traveller raids, a 2013 police anti-gang operation targeting the Dixon City Bloods.
Yesterday in court, Siad admitted to being affiliated with the gang.
He pleaded guilty to drug and gun trafficking charges and could face 10 years in prison.
Siad secretly filmed and tried to sell video of the former mayor smoking crack in a Windsor Road home in 2013.
Ford for months denied the video existed before eventually admitting to using crack cocaine. Ford dropped out of last year's mayoralty race for health reasons but was successfully elected to city council.
Siad is due to be sentenced Tuesday afternoon.