Large, high-quality Bi 2 Sr 2 Ca 1 - x Gd x Cu 2 O y (Gd-doped Bi2212) single crystals for x=0-1.0 were successfully grown by a self-flux method for the first time. The structure of the crystals was examined by X-ray diffraction and Laue photographs. All the crystals possess the pure Bi 2 Sr 2 CaCu 2 O y (Bi2212) phase with the in-plane dimension up to 8x3 mm 2 . The c-axis length of the doped crystals decreases with increasing Gd concentration. The superconducting transition temperature T c of the crystals increases slightly at first and then drops rapidly upon Gd doping, which can be described well by the hole filling mechanism.