Chris Palmer fired the Gills ahead from a free kick after just six minutes.
Chris Palmer celebrates his goal with Matt Lawrence and Cody McDonald.
Cody McDonald is challenged by former Gills defender Dean Beckwith and Liam Davis.
Adebayo Akinfenwa tries to muscle his way clear of a challenge.
John Nutter tries to shrug off the attention of Ryan Gilligan.
Leon McKenzie sends Alan Julian the wrong way from the penalty sport as Northampton take the lead.
Dennis Oli was a second half substitute but wasnt able to find an late equaliser.
Andy Hessenthaler shouts out instructions from the touchline but couldnt prevent another away defeat for his team.
KM Group photographer Barry Goodwin captured all the action at Sixfields Stadium as Gillingham's miserable away form continued with a 2-1 defeat.
See a selection of his pictures above.