Officers recovered a massive haul of cocaine, amphetamine and diazepam from the garages in Baillieston.
Police swooped on the lock-ups in Glenburn Avenue at around 6pm on Monday.
The drugs have an estimated street value of £1m.
No arrests have been made in connection with the find.
Detective Inspector Frank Clarke, from Stewart Street CID, said: "This was an intelligence led operation aimed at targeting those who bring misery to our communities.
"I would urge members of the public to continue to come forward with any information or concerns in their areas."
Anyone with information is asked to contact Police Scotland on 101.