Yes, but you’ll need to set it all up - Here is a suggested method for doing this:
First, install cast-web: [RELEASE] cast-web 0.2 - Chromecast Device Handler & SmartApps
You’ll have to follow the instructions https://vervallsweg.github.io/smartthings/ to get it running - note the Prerequisites, as you will need a computer/device to run the node.js. This will add your Google Home Speakers as Things.
Once you have the speakers there, they behave the same way as Sonos speakers. You can then use the SmartApp called “Speaker Companion” which is in the Marketplace under SmartApps --> Music & Sounds. This allows you to play one of the preset sounds, or a custom message on a specific speaker when some event happens such as Motion, a switch is changed, Contacts are opened or closed, etc.
You can also use WebCoRE to do more complex actions.
HTH