  The Cherenkov Telescope Array (CTA) is a forthcoming ground-based observatory
for very-high-energy gamma rays. CTA will consist of two arrays of imaging
atmospheric Cherenkov telescopes in the Northern and Southern hemispheres, and
will combine telescopes of different types to achieve unprecedented performance
and energy coverage. The Gamma-ray Cherenkov Telescope (GCT) is one of the
small-sized telescopes proposed for CTA to explore the energy range from a few
TeV to hundreds of TeV with a field of view $\gtrsim 8^\circ$ and angular
resolution of a few arcminutes. The GCT design features dual-mirror
Schwarzschild-Couder optics and a compact camera based on densely-pixelated
photodetectors as well as custom electronics. In this contribution we provide
an overview of the GCT project with focus on prototype development and testing
that is currently ongoing. We present results obtained during the first
on-telescope campaign in late 2015 at the Observatoire de Paris-Meudon, during
which we recorded the first Cherenkov images from atmospheric showers with the
GCT multi-anode photomultiplier camera prototype. We also discuss the
development of a second GCT camera prototype with silicon photomultipliers as
photosensors, and plans toward a contribution to the realisation of CTA.
