How does gas pressure change with temperature?
It depends on what is containing the gas...
I presume you mean in a closed container, so in that case an increase in temperature causes the gas molecules to obtain more kinetic energy (move around faster).
Thus the pressure increases because the molecules bump into each other and the sides of the container more often.
Obviously if the container is large the effect of temperature increase is less, but still there nonetheless.
Decrease in temperature has the opposite effect in other words, decrease the pressure.
Hope I helped :)