Redmine using Gmail for sending mail

JumpBox Version: 1.1.18
Redmine Version: 0.9.3

Hello, I'm looking for instructions on how to setup Redmine JumpBox to work with a Gmail account for sending out mail.

I've been having problems getting the action_mailer_optional_tls installed while following these instructions:
http://redmineblog.com/articles/setup-redmine-to-send-email-using-gmail/

When I SHH into the JumpBox VM, I do not see the redmine folders. I would love to get instructions on how to get Redmine Jumpbox to use Gmail.

Thanks,
David

The Redmine Application is

The Redmine Application is installed in /var/data/redmine and Subversion project repositories are automatically created under /var/data/svn/. http://wiki.jumpbox.com/doc/app/redmine/faq/app_location

Also the Redmine wiki page may help ... http://wiki.jumpbox.com/doc/app/redmine

And the runtime page too ... http://wiki.jumpbox.com/doc/runtime

Cheers,
David