Thank you for your post.
Appending to a PDF is not supported in FileMaker Go. This is covered in the FileMaker Go Development Guide (bottom of page 15) at:
I also recommend reading the FileMaker Go Technical Brief at:
To print several layouts, they script should work the same. That is, print one layout, go to another layout, print that layout, go to the next layout, etc. What occurs when you go to print? Do you get an error message? Perhaps you are trying to use the same print options in FileMaker Go as FileMaker Pro? The print options that you set for a file in FileMaker Pro have no effect on the print options for the same file in FileMaker Go, and vice versa. For more printing information, see page 10 of the FileMaker Go Development Guide.
Let me know if you need additional clarification.