A one-month gas tax holiday that kicked in Saturday helped to push Orlando-area gas prices to their lowest average since January. A gallon of regular unleaded averaged $3.19 per gallon on Monday, down 15 cents from a week ago, according to the travel club AAA. The state is suspending 25 cents a gallon in gas taxes through the end of the month. Florida drivers could see gas even dip below $3 a gallon at some stations, and everyone will likely see a “sizable discount” this week, said Mark Jenkins, a spokesman for AAA. “This gas tax builds on the previous downward pressure on pump prices, stemmin…