 The 2005 – 06 season started with Neale Cooper being appointed as the new manager , but despite achieving a 3 – 2 victory over Premiership side Portsmouth in the Football League Cup , the team struggled in the league , and shortly after defeat in the first round of the FA Cup by Northern Premier League side Burscough , Cooper resigned . He was replaced by Ronnie Jepson , who led the team to a mid @-@ table finish , which he repeated in 2006 – 07 . After a poor start to the 2007 – 08 season Jepson resigned , and Mick Docherty and Iffy Onuora were appointed joint caretaker managers . Docherty left the club a month later , but Onuora remained in charge until the appointment of Mark Stimson on 1 November 2007 . At the end of the 2007 – 08 season the club was relegated from League One . The following season the Gills earned promotion through the play @-@ offs after finishing fifth in the league , Simeon Jackson scoring the only goal in the final against Shrewsbury Town at Wembley Stadium . In the 2009 – 10 season , however , the Gills were relegated back to League Two , with Stimson leaving the club by mutual consent two days after the end of the season . Within two weeks , Andy Hessenthaler returned for a second spell as manager . 
