How do I get technical information on my video card? (Model, RAM, Mhz, etc) I'd like to get as much technical information about my MacOSX's video card as possible... technical details, even serial number if the card has a unique identifier.

I intend to use this information do research what GPU specific commands I can run on a given laptop.
Select Graphics/Displays from the output of system_profiler.

In a mac terminal, type:

system_profiler SPDisplaysDataType

The output will show something like this with your card name and details:

system_profiler SPDisplaysDataType

Graphics/Displays:

AMD FirePro D500:

  Chipset Model: AMD FirePro D500
  Type: GPU
  Bus: PCIe
  Slot: Slot-2
  PCIe Lane Width: x16
  VRAM (Total): 3072 MB
  Vendor: ATI (0x1002)
  Device ID: 0x679e
  Revision ID: 0x0000
  ROM Revision: 113-C3861J-687
  gMux Version: 4.0.11 [3.2.8]
  EFI Driver Version: 01.00.687
  Displays:
    CS230:
      Resolution: 1920 x 1080
      Pixel Depth: 32-Bit Color (ARGB8888)
      Display Serial Number: 27673034
      Main Display: Yes
      Mirror: Off
      Online: Yes
      Rotation: Supported
    CS230:
      Resolution: 1920 x 1080 @ 60Hz (1080p)
      Pixel Depth: 32-Bit Color (ARGB8888)
      Display Serial Number: 27712034
      Mirror: Off
      Online: Yes
      Rotation: Supported
      Television: Yes

AMD FirePro D500: