Glued-in Rod (GIR) connections are increasingly used in mid- and high-rise timber structures due to their high stiffness and moment-resisting capacity; however, the direct exposure of the end plate makes them thermally vulnerable under fire. To address the lack of experimental data on the thermal behavior of GIR connections, this study investigates their component-level temperature response under standard fire conditions. Unloaded fire tests were conducted using two variables: an unprotected end plate and a 38-mm fire-protective board. The specimens were heated for 180 minutes following ISO 834-1 (1999), and thermocouples were installed on the end plate, steel rod, threaded rod, and at multiple depths within the glulam column and beam. Test results showed that, in the unprotected specimen, the end plate, steel rod, and threaded rod reached critical temperatures at approximately 45, 120, and 90 minutes, respectively. In the protected specimen, most components remained below critical steel temperatures, though localized temperature spikes occurred when rods became exposed due to charring. A fundamental FEM heat-transfer model was developed from these results for future parametric fire-resistance studies.