I'm no great expert on graphics cards - especially for gaming - but I would think the only issue will be whether your graphics card is capable of driving the new display. Or more specifically whether the card can make best use of the resolution and screen area that you will have available. Take a look at the resolutions that you can set on your machine (right-click on your desktop and select Properties will take you to the settings) and see if you can select the resolution offered by your new screen.
If you need to get a new graphics card and just use the machine for 'normal' stuff - that is not gaming - I would guess you'll have a wide selection to choose from as this size of display is pretty common these days.