The Google Cloud products page [1] lists 17 main products. Two are in alpha (Container Engine, Deployment Manager), one is in beta (Pub/Sub).
The rest are fully supported.
Wait a second. I just clicked though the items on that page, and the following are listed as alpha:
Actually, I just filed a bug internally to fix docs. You're right -- alpha/beta is not clearly shown consistently enough (I missed at least one in going through that list).
In some cases, there are GA products with alpha/beta features & languages, so it may be difficult to figure out the best way to communicate at the top level (e.g., the examples pointed out for a given feature in a given language, or HTTP load balancing vs Network Load balancing).
But in cases where it's clearly a beta product, it should be clear.
Wait a second. I just clicked though the items on that page, and the following are listed as alpha:
The following are in Beta: If these aren't in beta/alpha, then maybe you should update your docs.