Rare earth garnets (TR₃Fe₅O₁₂) have excellent manetic-electrical and optical properties allowing them to have many applications such as transformers, microwave devices and data storage. Such applications depend on their structure and morphology, which are greatly influenced by the substitution of cationic sites. The system [Gd_1−xTR_x ]₃Fe₅O₁₂ with TR = Dy, Lu and Pr with x = 0.1, 0.5 and 1.0 for TR = Dy and Lu and x = 0.1 for TR = Pr was produced using the solid state reaction technique. The material produced after mixing the reagents was pressed into tablets, heat treated and exposed to different conditions of time and temperature. The structural and morphological characterization of the samples were performed using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Which proved the characteristic structure and composition of the garnet-type structure. Magnetic characterization was performed using a vibrating sample magnetometer (VSM). The magnetic responses of the synthesized material were also measured using ZFC-FC (Zero Field Cooling) conditions with constant applied field (1.0, 5.0, 10.0, 20.0 and 25.0 KOe) between temperature ranges from 50 to 350 K; magnetic hysteresis measurements at low temperatures between -30.0 ≤ H ≤ 30.0 KOe fields for certain temperature values. The characterizations allowed comparing the structure and magnetic properties of the rare earth garnet produced in this work.