Aubameyang strikes again as Gabon top group
Both teams had already qualified and Tunisia made eight changes to their starting line-up but that did not prevent them producing a niggly encounter which included a pushing match between several players at the end.
Gabon took one of few chances in the 62nd minute with a quick exchange of passes which sliced through the Tunisian midfield.
The break ended with Daniel Cousin finding Aubameyang and the 22-year-old Saint-Etienne player scored with a low shot from the edge of the area with Tunisia goalkeeper Rami Jeridi unsighted.
Three-goal Aubameyang has been the inspiration behind Gabon's surprise run into the last eight, achieved with a dramatic 3-2 win over Morocco in their previous match.
Gabon topped the group with a maximum nine points while Tunisia finished with six.