Barbara, you're losing your color?? Back out on the jet ski girl!!!!!!
Anyway, a driver is a softwar program that lets some (any) piece of hardware talk to the computer (processor). Updated drivers are generally free to download from your computer manufacturer's web site (customer service/downloads.) If it's a hardware problem, you may have to buy another video card.
If you have Windows XP, you can right click on "My Compuer", select properties at the bottom of the list, select the "Hardware"tab, and the click on the "Device Manager" tab.
You will then see a list of devices on your computer. If you see a yellow explanation mark, you have a problem there, and a red "X" is a bigger problem, but not necessarily harder to fix.
Even if you don't have a red or yellow indication, you can click on "display adaptors" and get a list of your computers display options. Hopefully there is only one. Double click on your adaptor and you are presented with a box that has a number of thing you can do.
(I am assuming you are certain you have a video driver problem as you say.)
One of the tabs on top of this window is "Driver" and on the lower portion of this window is a "troubleshoot" choice. Under the driver selection you can get driver information, and update, rollback and uninstall the video drivers.
I thought Gateway gave "lifetime" phone or on-line support? If so they can walk you through the correct process.
Anyway, you can go through the troubleshoot process, or select update driver under the driver tab. Your computer will start a search process for an updated driver. (which you control, to an extent)
My disclaimer, their is much info I don't have, just trying to give you a start. But it is the process I would use to fix a video driver on my computer.
Good luck.