You don't need to ask me: Google provides their own handy list of examples (some like messaging API show up under other names like XMPP; others don't appear on this list because they were marketed differently, e.g. Google Print):
Those are just features of a single product (appengine) which has been around for more than a decade and through several generations. Every product under every cloud vendor has API and feature changes over the lifetime.
GCP has never had a major product line shutdown. The only thing that comes close is Google Maps API pricing changes, but technically the service is still there and has even more functionality.
Many of those seem to have been around for well more than the 1 year deprecation minimum, and most of them appear to be some combination of Alpha/Beta products or language runtimes. Alpha/Beta products aren't really on-topic, and the language runtime stuff doesn't look all that different from how AWS does runtime deprecations.
