Is it still okay to drive the car when the radiator light goes off and on?

My antifreeze level always checks good. I have a temp gauge t hat does not show hot. I don't think I have ever had the pressure test done

If it is just the light flashing and the gauge reads ok then you can drive it until you get the sensor replaced

This morning the light came on and stayed. I kept an eye on the gauge and it did not move.

when you say the gauge didnt move did you mean it stayed at 0 or at operating temp

It rides at two "tics" on the "C" side of midline. As usual

then you should be okay to drtve just get the light fixed.......