  The stellar mass and metallicity are among the fundamental parameters of
galaxies. An understanding of the interplay between those properties as well as
their environmental dependence will give us a general picture of the physics
and feedback processes ongoing in groups of galaxies. We study the
relationships and environmental dependencies between the stellar mass, and gas
metallicity for more than 1900 galaxies in groups up to redshift 0.35 using the
Galaxy And Mass Assembly (GAMA) survey. Using a control sample of more than
28,000 star-forming field galaxies, we find evidence for a decrement of the gas
metallicity for galaxies in groups.
