Take a look in the Technical Resources Center of this TechNet site for a document titled: Container_Fields_in_FMP12_en.pdf
It states that printing from an interactive container field is available if Acrobat is installed and you are using Mac OSX. I was unable to find any discussion of a method to provide printing of a container PDF file from within Go. This appears to be a limitation of Go on iOS.
Your current solution might be simplified by making access to the airprint printer simpler, but security restrictions may not make that desirable.
This looks like one of those unhappy areas where we see clearly that "FMGo isn't FMPro."