Yes, this is definitely possible.
If you are an Amazon S3 user, you can easily migrate your applications that use Amazon S3 to use Cloud Storage. You have two migration options:
Simple Migration: This is the easiest way to get started with Cloud Storage if you are coming from Amazon S3 because it requires just a few simple changes to the tools and libraries you currently use with Amazon S3.
Full Migration: A full migration from Amazon S3 to Cloud Storage requires a few extra steps compared to a simple migration, but the benefit is that you can use all the features of Cloud Storage, including support for service accounts, multiple projects, and OAuth 2.0 for authentication.
For more details check out https://cloud.google.com/storage/docs/migrating