It’s been the motivational motto at San Mateo game store Gator Games & Hobby since the store’s opening 18 years ago: “Get the grades, get the games.” And this year is no different, as the summertime tradition is currently in effect. From now until July 31, any student from preschool to college can bring in their report card for a reward courtesy of Gator Games. The reward is store credit, and for gamers that’s especially worthwhile. Owner Jean Seaborg said she tends to base the amount of store credit on the quality of the grades – with straight A’s earning the biggest reward. Gator Games is …