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Real-Time Embedded Systems (RTES) have an increasing role in controlling the IT that we use on a day-to-day basis. The behaviour of an RTES is not based solely on the interactions it might have with its surrounding environment, but also on the timing requirements it induces. As a result, ensuring that an RTES behaves correctly is non-trivial, especially after adding time as a new dimension to the complexity of the testing process. In previous research, we introduced a 'priority-based' approach which tested the logical and timing behaviour of an RTES modeled formally as UPPAAL Timed Automata (UTA). The 'priority-based' approach was based on producing sets of timed test traces by achieving timing constraints coverage according to three sets of priorities, namely boundary, out-boundary and in-boundary. In this paper, we introduce a new testing tool 'GeTeX' that deploys the "priority-based" testing approach. GeTeX is a complete testing tool which generates timed test-cases from UTA models and executes them on the System Under Test (SUT) to identify faults. In its current version, GeTeX supports Control Area Network (CAN) applications.