Jackson netted his 17th goal of the season within seconds of the restart after Rene Howe's flick had put him clear as the Gills secured a vital win in their battle against relegation.
Stimson said: "They were two great finishes from Jacko and it was a very good three points against a team that will probably be in the play-offs at the end of the season.
"The first goal was a fantastic strike - it was a good first touch and an even better second touch with his left foot that found the bottom corner. But I actually think the second goal was better. He ran 15 yards at pace and beat the keeper with the outside of his right foot.
"Long may that continue and lets get him back up those goalscoring charts."