G-mailing multiple PDF files

If you have previously just exported and saved four PDFs from Pages to files, then you can manually launch Apple Mail, choose New Message, enter the text of your mail message, and then drag/drop those four PDFs onto the Mail compose window.

Pages will only open one Mail compose window for a given export to PDF > Send a Copy > Mail request. It will only add the current PDF that you have exported, not multiples.

What is stopping you from doing that by just attaching the files to an outgoing email?