  GALA (Mucciarelli et al. 2013) is a code written in standard Fortran 77 and
aimed at finding the best atmospheric parameters and the abundance of
individual elements by using the equivalent widths (EWs) of metallic lines,
providing graphical and statistical tools to evaluate the goodness of the
solution. The derivation of the abundances is performed by using a modified
version of the WIDTH9 code(originally developed by R. L. Kurucz) in its Linux
version (Sbordone et al. 2004). In the current release, GALA can manage the
classical grid of ATLAS9 models computed by (Castelli & Kurucz, 2004), the grid
of new ATLAS9 models computed for the APOGEE survey (Mezsaros et al., 2012) and
the MARCS models with the standard composition (Gustafsson et al., 2008). When
the ATLAS9 models are used, new model atmospheres are calculated starting from
an existing guess model and according to the pre-tabulated Opacity Distribution
Functions (ODF) and Rosseland opacity tables. When MARCS are used, each new
model is obtained by interpolating within the MARCS grid.
