Google Chat, Google Spaces and Google Sites
Many Google Sites aficionados, Google Workspace administrators and Internal Communications staff have expressed a keen interest in the combined powers of Chat and Sites. Google Sites provides mostly static wiki-type content, while Chat, in particular Spaces, enables organizations to have a internal chat room experience. Google Spaces can also be used for company announcements and easily pings notifications to employees.
Can You Add Google Chat Widget to Google Sites?
No. There has never been support to embed Google Chat or Gmail into Sites, even in Classic Google Sites. Perhaps there are security concerns with such a move. Live chat widgets can use the Embed Code feature, but can look clunky. These don't take advantage of the Google ecosystem for notifications, at least off the bat.
Can You Embed Google Spaces into a Google Sites Intranet?
No. Currently Google Spaces are not embeddable. They cannot be added as a gadget or iframed into a internal Google Site. This was confirmed to be off the Google Workspace roadmap scope in February, 2024 according to a webinar regarding Google Currents. This move was debated by Google Sites users on the Google Workspace community forums and proposed as a new feature idea to be considered.
Google Currents and Google Plus Communities could previously be integrated into Google Sites. Easy embedding was supported at the time, similar to adding Google Cloud Search, Awesome Table and other apps like Google Groups forums. Therefore, there is a currently a vacuum for this feature which many reason ought to be filled. It would certainly aid in bridging the gap between static and dynamic information available in Google Workspace, a platform noted for collaboration options.
Alternative Solutions
You can link directly to specific Google Spaces from your Google Sites intranet
You can develop a custom Google Sites announcements widget powered by Google Sheets (example)