Is there any support in OS X for the huge line of Gige Vision cameras now available? ...
I do not use Gige, so I cannot test this with OS X, but it seems not.
This GEViCAM page http://www.gevicam.com/products/peripherals.html states that a PC is "... required for GEViCAM cameras..."
This GEViCAM page http://www.gevicam.com/downloads/sdk.html states that "... GEViCAM's software is officially supported under Microsoft Windows... Please contact us on SDK for other OS."
I suggest you contact GEViCAM directly http://www.gevicam.com/contactus/gevicam.html and ask them if their product can work with your system.