The first scientific results of the Gaia-ESO Survey, based on the analysis of data obtained during six months (Jan-Jun 2012) are beginning to appear on refereed journals:
The Gaia-ESO Survey: Reevaluation of the parameters of the open cluster Trumpler 20 using photometry and spectroscopy by Donati et al. (2014, A&A, 561, A94)
The Gaia-ESO Survey: Abundance ratios in the inner-disk open clusters Trumpler 20, NGC4815, NGC6705 by Magrini et al. (A&A, in press, see arXiv:1312.6472)
The Gaia-ESO Survey is a public high-resolution spectroscopic survey on FLAMES@VLT (PIs Gilmore & Randich), targeting about 105 stars in the Milky Way, and about 100 clusters (from very young associations, to open clusters, and globulars). The Bologna Observatory has a strong and qualified involvement in the Survey and in the two papers above.