Notable features include: auto pagination, dynamic cursor, custom font tags, TTF and Type1 font support, virtual page(splitting into columns), image insertion, , text wrap, 32 barcodes, geometric shapes and vector drawing, EPS template support, Ruby on Rails data grid and multiple output formats.
And now, it's hello world
# gem install rghost
require 'rghost' doc=RGhost::Document.new doc.show 'Hello World' , :color => :blue doc.render :pdf, :filename => '/tmp/mytest.pdf'