Gunjur, who lost to Manjai 2-0 in their second encounter last Thursday, knew that a defeat against Serrekunda Central will dash their chances of qualifying for the quarterfinal.
Serrekunda Central drew 1-1 with Bakau in their second group B clash played on Thursday and as such came for a win against Gunjur to keep their title hopes alive.
But it was Gunjur who carried the day, opening the scores through striker Saikouba Manneh in the first half from a penalty spot to give the South boys the lead.
Lamin Jallow sealed the victory for Gunjur in the second half to deny Serrekunda Central a win against the South boys.
Bakau drew 1-1 with Lamin at the Serrekunda West Mini Stadium with Manjai also being held to a 1-all draw by Brufut at the Father Gough Sports Complex in Manjai Kunda on the same day.
Meanwhile, BEM on Friday threw away a 2-nil lead to share the spoils with Serrekunda East in a well-fought encounter played at the KG5 Mini Stadium in Banjul.
Edi Sonko Faye put the North Bank Region side ahead in the 15th minute when he converted from the penalty spot.
Ensa Keita doubled the lead for BEM, who lost their opening two games of the competition, two minutes later.
Modou Lamin Gaye and Sering Babou Cham were on target for Serrekunda East in the 23rd and 60th minutes of the game to make it possible for each side to go home with a point.