Will an add on video card unfreeze my gateway

Maybe.

To be honest, it depends on what the problem really is.. If it is a problem with the video chip and it can be disabled. Then probably. If not, it will not resolve anything.

But note, my experience with Gateway is that they usually just put a power supply big enough to power the computer as-is. If you add a modern video card, it may overload the power supply.

Yes it will surely work.

Remove the add on video card for it is causing the problem. The video card you have is defective. Hope thi can help you..Don't forget to rate me please..Thanks..