GJ 328 is a cool M-dwarf (about 0.65 solar masses, 3,897 K, 0.63 solar radii), 20.5 light-years from Earth. GJ 328 c is a 0.07-Jupiter-mass companion, with an orbital period of 242 days, at 0.657 AU from its star, discovered in 2023 via radial velocity. GJ 328 b is a 2.51-Jupiter-mass companion, with an orbital period of 10.3 years, at 4.110 AU from its star, on an eccentric orbit (e ≈ 0.23), discovered in 2013 via radial velocity. Mutual gravitational tugs between the planets can slowly reshape their orbits, preserving clues to the system's assembly.