Hi jklingel,
The business gmail account is a great option for libraries that don't have their own email server. However, I believe that gmail requires SSL and port 465 which are settings that are not currently available to the public. They will be in our next major release (V7).
Our support staff can make these changes for you. Just send an email to
support@evancedsolutions.com and let them know which library you are with and that you are using gmail and would like the configuration changed to allow for that. If you let us know what time you are going to setup the gmail account with our software we'll be sure to make these changes at the same time so you don't have any email downtime.