We present our Over-the-Air Ultra Reliable Low Latency Communication system implementation in GNU Radio. This includes our Cloud Radio Access Network concept and the used Out-Of-Tree (OOT) modules for multicarrier synchroniza- tion, GFDM modulation, polar coding, and symbol mapping. We demonstrate how we use GNU Radio with Universal Software Radio Peripherals (USRPs) on our Automated Guided Vehicles (AGVs) and as part of our base station to realize a full transceiver. This includes illustrations and hands on descriptions how we integrate all components. Finally, we discuss our measurement results in this paper. To this end, the conducted Signal-to-Noise-Ratio (SNR) measurements over our testbed area as well as latency measurements validate the feasibility of our implementation for Ultra Reliable Low Latency Communication (URLLC) requirements.