AppGate is available as a virtualised appliance. This is an enterprise ready virtual appliance for use in Virtual Box and ESXi 5.5 (and newer) environments. You can download the most recent release from here
and you should contact email@example.com for the required username and password. This has been tested on ESXi5.5 (HW 10) and VBox 5.X.There is more information in the manual about installing appliances including detailed installation guides.
After installation - the configuration will be done through the web-based AppGate console. Full details of how to do this can be found in the configuring the first appliance section of the manual.
NOTE: For Trial or production use please contact firstname.lastname@example.org.