Gamma-ray astronomy is one of the most active topics in astroparticle physics involving both particle physicists and astrophysicists leading to the design of new types of research infrastructures. The Cherenkov Telescope Array - CTA - is a proposed new project for ground based gamma-ray astronomy. This communication aims at providing a report of the most relevant activity carried out and in progress within the CTA consortium in EGEE and a view of perspectives and implications of ICT-based infrastructures such as the future EGI for the needs of a project like CTA.