Drivers likely will feel the sting as they fill their tanks this Christmas season as experts say the cost of gas could near $3 a gallon.Georgia may not top the $3 per gallon threshold, but in the past week the price of regular unleaded gas has gone up about 13 cents in the state, according to a weekly AAA Auto Club South report. The current price is about $2.87 a gallon. It was $2.72 last month and $2.51 this time a year ago.Jessica Brady, AAA Auto Club South spokeswoman, said the price jump likely stemmed from the value of the U.S. dollar declining after poor economic news last month.