In addition to midfielder Gilligan's milestone, defender John Johnson and midfielder Abdul Osman have a chance of returning for the npower League Two clash.
Osman has not fully recovered from a calf injury and Johnson (leg) took a hard knock from Stevenage defender Darius Charles in the 1-0 win last weekend but the pair may make the bench.
Tadhg Purcell is recovering well from a knee injury and club physios are happy with the striker's progress as he battles to be fit before the end of the season.
A home win for the Cobblers could see Ian Sampson`s men move seven places up the table. The side have not lost at Sixfields for three home matches and top scorer Leon McKenzie will be looking to add to his tally of six goals.
Source: PA
Source: PA