Nick Gatewood had four hits on the day, including a 3-for-3 outing in Game 1, while Ryan Blanton and Jaylen Woullard each had three hits in the doubleheader.
Hunter Gaddis and Tanner Thomson allowed just two earned runs and combined for 11 strikeouts, Will Kilgore hit a two-run homer and Ryan Blanton had a three-run triple for the Panthers (14-23, 4-12).
Senior center fielder Ryan Blanton leads the Panthers in hits, runs, RBI, homers, triples, walks and stolen bases.
Starter Bryan White allowed just three hits in five scoreless innings, but Georgia Tech scored all its runs in the seventh inning or later.
Georgia State Athletics celebrated the 2016-17 season with the Golden Panther Awards, the annual year-ending athletics recognition banquet organized and produced by the student-athletes themselves.
Jarrett Hood had his third career walk-off hit in GSU's 3-2, 12-inning win over Troy on Friday.
Troy scored four runs in the top of the ninth for a 5-3 victory over Georgia State Saturday at the GSU Baseball Complex, preventing a Panther sweep and spoiling another strong start by freshman Hunter Gaddis.
Jarrett Hood's two-out single in the bottom of the 12th gave Georgia State a 3-2 walk-off win over Troy Friday at the GSU Baseball Complex, clinching the Sun Belt Conference series for the Panthers.
Ryan Blanton went 4-for-5 with a home run and three runs batted in to lead Georgia State to a 9-3 victory over Troy in their Sun Belt Conference series opener Thursday at the GSU Baseball Complex.
Thursday and Saturday games will air on PantherVision.
Nick Gatewood had two hits, and Cam Sperry, Terrell Frazier and Jack Thompson drove in runs.
Georgia State has won three straight against Mercer and five of the last six meetings, including both games last season.