Chosen Solution

have cinema monitor,plug dont match g4,can it be replaced? possibly with smaller vga type Update (02/28/2017) the back of graphics card,dont have same pin sequence to allow the cinema monitor to work as plug n play,can plug on monitor be replaced or do i need some type of adaptor/convertor?

You probably do better just getting a video card with the right video connector like this one: https://eshop.macsales.com/item/ATI%20Te