Being the first-light telescope for the GMT, G-CLEF will enable a broad range of observational programs that can address several of the most urgent astrophysical problems highlighted in the 2010 Decadal Survey.

Science Area Goals
 Exoplanets Precision Radial Velocity Studies
Exoplanet Atmospheric Science
Stellar Abundance The Discovery and Characterization of the Most Metal Poor Stars
Abundance Around and Beyond the Local Group
Cosmology Characterizing the First Stars and the Primordial ISM
Searching for Variations of Fundamental Constants on Cosmological Scales