The glass formation regions are determined in the GeS₂-Ga₂S₃-MCl [where M = Li, (Na), K, Rb, Cs, (Ag), and (Tl)] and Ga-I-NaCl systems. The DTA data are obtained for the Ga₂S₃-MCl systems. The Raman spectra of the GeS₂, 0.67GeS₂ · 0.33GaS_1.5, and RbGaS_1.5Cl glasses are measured. The experimental data are discussed with due regard for the high complexing ability of gallium ions and the formation of the [GaS_3/2Cl]^- complex anions. It is noted that the formation of complex structural units is favorable for increasing the glass formation regions in the studied systems.