ruby-ghostscript is a Ruby wrapper for ghostscript. It is useful if your deployment requires binary of ghostscript
If you are using Heroku, you don't need this gem because Heroku's already
shipped a binary of gs inside /usr/bin
Beware: The versioning scheme isn't based upon Semantic Versioning! The first two version numbers are inherited from ghostscript. Only the last number is used to indicate changes in the Ruby wrapper itself.