We are sorry to hear that you have such issue. At the moment our GroupDocs Ruby SDK working fine and you can try to use it right now. The status "Building Failing" associated with a broken test, it will be fixed today.
Also please note, that you can get GroupDocs Ruby SDK from RubyGems.org. The link to current latest version - https://rubygems.org/downloads/groupdocs-1.9.0.gem. Please note also on the dependencies for using our GroupDocs Ruby SDK in groupdocs.gemspec file.
If you will have more questions or need any details, please do not hesitate to contact us.
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