The geosynthetic-reinforced soil integral bridge, as a novel type of abutment, demonstrates significant application value in small-span bridge and culvert engineering. Currently, research on its operational mechanisms is limited, particularly regarding the bearing capacity characteristics of abutments, which have been seldom studied. This paper presents a static load test of a geosynthetic-reinforced soil integral bridge model based on the Z(v)erovinci bridge in northern Slovenia. The analysis includes the settlement at the top of the abutment, the displacement of the facing panel, the horizontal displacement of the soil behind the facing panel, the pattern of reinforcement strain, and the nature of the potential fracture surface. The measured tensile force of the abutment reinforcement is compared with the calculated values recommended by three codes. The results indicate that under maximum load, the top settlement of the abutment does not exceed the usage and strength limits recommended by the code. The horizontal displacement of the middle panel of the abutment is the largest, and the maximum soil displacement behind the front and wing wall panels occurs at the top of the model. Under specific loading conditions, the maximum reinforcement strain of the longitudinal bridge reinforcement remains below the normative value, and the calculated stiffness values align well with the measured maximum tensile force of the reinforcement.