As a Perl coding enthusiast, I have extensive experience working with modules like Net::SMTP::SSL and Email::Send::SMTP::Gmail, which is exactly what your project requires. I've also got a deep understanding of Google SMTP protocols, which enables me to confidently tackle your task of modifying the email script to work seamlessly with the Email::Send::SMTP::Gmail module. Rest assured, I will ensure that the modified script remains highly efficient for sending out web form submission emails.