The club was formed in 1914 as one of the founding members of South Coast Rugby League, and continue to participate in the Group 7 competition.

Gerringong, however, would go on to take out the premiership final with an 11–10 victory at the Kiama Showground, a match that would charge a sixpence to attend.

The journey into the Illawarra would only last a total of three years when the Lions returned to South Coast Rugby League Competition in 1928.

Gerringong has won more premierships than any other side in Group 7 history with 20, with 4 premierships in the decade starting in 2010, which was won with a spectacular late field goal to Pat Cronin, defeating Warilla-Lake South Gorillas 21–20.

Gerringong made the grand final four years in a row from 2010 to 2013, losing to Warilla in 2011 and Albion Park in 2012, before success in 2013 that saw Brad Davidson kick a field goal with four seconds remaining in regular time to even the score 13-13 and saw Davidson kick another field goal in extra time for Gerringong to take out the premiership in a thrilling victory.