Gaplock GDO. Automated Garage Door Lock by Automated Security Technologies, Inc., is compatible with Chamberlain, Craftsman, Genie, Liftmaster and Linear garage door openers. For Homes with Automated Residential Roll-up Garage Doors, Gaplock GDO Automatically Locks a Garage Door Every Time It&rsquo;s Closed and Unlocks It Every Time It&rsquo;s Opened