[en] GRETINA, a first implementation of a gamma-ray tracking array, combines unparalleled position resolution, large Ge efficiency, and good P/T to provide a powerful tool for in-beam gamma-ray spectroscopy. The commissioning in 2012 demonstrated the technical feasibility and unique capabilities of a gamma-ray tracking array, and successful physics campaigns have followed at NSCL/MSU (2013/14) and ATLAS/ANL (2014/15). New physics results have been shown in a broad range of topics, confirming the excellent performance of the array in both high and Coulomb barrier- energy environments, and in multiple configurations. GRETINA is again operating at NSCL for a second campaign coupled to the S800 spectrometer. In line with the topic of this workshop, we will present selected highlights from these scientific campaigns that have focused on the studies of nuclear shapes, symmetries, and collectivity. This document is composed of an abstract and the slides of the presentation. (author)