Gaston is a founding partner of Hadjianastassiou, Ioannides LLC. He graduated from Kings College London with an LL.B. (Hons) degree and, having attended the Bar Vocational Course at the Inns of Court School of Law, he was called to the Bar by the Middle Temple.
Gaston is a member of the Sport Supreme Judicial Committee.
His areas of practice include banking law, corporate and commercial law, probate and administration of estates, immovable property law and employment law.