Gavin is a Partner, Digby Brown, one of Scotland's largest specialist litigation firms. He undertook a commercial traineeship at Dentons in Glasgow and Edinburgh before moving to his current firm where he specialises in reparation litigation.

Gavin maintains an interest in sports related legal matters and holds a Masters in International Sports Law from Instituto Superior de Derecho y Economia (ISDE), in Madrid. Gavin is also a Disciplinary Panel Member of Scottish Athletics and England Boxing.

Gavin is a keen amateur footballer. During his time at Glasgow University, he played for the Glasgow University amateur football team that qualified for the professional Scottish Cup.