He practises in a diverse range of areas, including appearing in criminal trials, commercial and equity matters and family provision claims.

He regularly appears in the Supreme Court of NSW, and has also appeared in the State's courts and tribunals throughout Sydney and regional NSW. Prior to being called to the Bar, Mr Gunning was a solicitor who practised in Moree and Parramatta.

Mr Gunning has degrees in Law and Economics (Hons) from the University of Sydney.