VES is just a guess on my part, quick research brought this up
VES is called a 22 way VES
you do not
have GPS on the MYGIG RBZ
you do have a AM/FM antenna plug
you also have a SDARS plug, Satellite Digital Audio Radio Service (SDARS)
Video Entertainment System (VESŪ) - Our MyGIG is VES ready. The VES feature will allow for audio & video inputs for multimedia installations. Perfect for your iPOD VIDEO, iPHONE VIDEO, DIGITAL TV RECEIVER, MP3 Player, Laptop, XBOX, PS3, or other Game System to be displayed on the MyGIG screen. The VES feature also allows for audio & video outputs for our HEADREST DVD SYSTEMS or ceiling monitors. (Plug in and create your own custom visual and audio experience.) Our MyGIG's video and audio multimedia output is selectable using radio touch screen buttons. (Dual zone so you can watch or listen to something different than the rear seat screens.) Great for cars without factory rear seat entertainment. Now you can easily add your own.
FYI - VES can only be activated with appropriate VES programming, LOCKPICK COMBO, or our LOCKPICK CHR550 COMBO interfaces. Be sure to check out our DIGITAL TV RECEIVER which allows you to watch live over-the-air digital TV on your MyGIG display.
Look at this site, it is the full installation done in drawings, it shows the sockets at the back of the radio, it shows the RHB radio in the drawings, not the RBZ
the Ram installation is close to the bottom of the drawings