The Kavli Institute for Cosmological Physics (KICP) at the University of Chicago and GMTO are planning a joint workshop to be held in Chicago on June 10-12, 2013. The goal of the conference is to examine the role of galaxies as probes of cosmology, both today and in the future as large galaxy surveys and the next generation of large telescopes, in space and on the ground, come into being. We will bring together theorists and observers to discuss contemporary problems in cosmology and galaxy evolution as well as the opportunities offered by a new generation of facilities and surveys. The conference will be organized into five half-day sessions. Keynote speakers will provide an overview of the state of theory and observation in each subfield. Contributed lectures will delve into the details of front-line research issues. The first session will review relevant surveys and facilities, including the GMT, large imaging surveys such as the Dark Energy Survey, LSST, and Euclid among others, and upcoming missions, such as the James Webb Space Telescope. This will be followed by sessions on First-Light and Reionization of the Universe, Galaxy Formation and Assembly, Intergalactic and Circumgalactic Gas, and Galaxies & the Intergalactic medium as probes of Dark Matter and Dark Energy. The conference will be held in downtown Chicago at the University of Chicago's Gleacher Center. A gala conference banquet will be held at the Adler Planetarium looking out on to Lake Michigan.