A police spokesman says the 20-year-old Gibbs was picked up by a taxi at North Sydney shortly before midnight and driven to Campbelltown, where he fled without paying.
The driver and two passers-by chased Gibbs and the four people became involved in a heated argument. Gibbs pushed one of the innocent by-standers onto the ground and he was later charged by police with common assault and fare evasion.
He's scheduled to appear in Campbelltown Local Court on August 10.
The Tigers have made little comment on the matter beyond a statement released by chief executive Steve Noyce, who has labelled it a "minor altercation"