Gas light

What is your question?

I was driving my car for awhile and my gaslight came on. I just filled it up to a little over half a tank today so I pulled over shut the car off and then restarted it. The gaslight went off and the gauge returns to half a tank. I drove my car home. I turned the ignition off and restarted it again and the it was still on half a tank. I turned the car off and left it at my house. I called my mechanic and he said I should have no problem driving it as long as there is gas in it. I need to know if my car is safe to drive because I have to get to work and too a doctor's appointment

What makes this problem better or worse?

Turning the car off and restarting it worked it did act a little funny starting

How long has your 2005 Chevrolet Malibu had this problem?

Gas light on