Download of GoogleCL 0.9.13 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is a product of iForgot Systems. We recommend checking the downloaded files with any free antivirus. The software lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
GoogleCL allows programmatic access to various Google services. It is also a convenient lightweight alternative to MacPorts. The application wraps a subset of APIs into a command-line tool that makes it easy to do things like posting to a Blogger blog, uploading files to Picasa, or editing a Google Docs file.
You may want to check out more software for Mac, such as Browsealoud, RAGE WebDesign or solr, which might be similar to GoogleCL.