I tried connecting to Google Cloud Storage by using the Denodo Distributed File System Custom Wrapper available in [Denodo Support Site](https://support.denodo.com/resources/denodo-connect/list/Denodo%207.0) which can be easily downloaded and accessed by users with support site access.
I was able to successfully create a base view to access CSV file on my Google Cloud Storage Bucket following the steps given in [HDFSDelimitedTextFileWrapper](https://community.denodo.com/docs/html/document/denodoconnects/7.0/Denodo%20Distributed%20File%20System%20Custom%20Wrapper%20-%20User%20Manual) section of user manual and provided the link to my Google bucket in File System URI as mentioned in the document.
Also, for the core-site.xml file made sure that it has the correct path to the JSON key file for my Google Cloud Storage Service Account.
The core-site.xml, located in the conf folder of the distribution, can be used as reference.
Hope this helps!