The GTFPGA Unit, a powerful and versatile hardware platform capable of performing highly dense computations in parallel with the RTDS Simulator, is a rack-mountable enclosure housing a Xilinx Virtex-7 FPGA board. The GTFPGA Unit is interfaced with the RTDS Simulator via an optical fibre cable connected from the rear of the GTFPGA Unit to a NovaCor chassis or rack-mounted PB5 Processor Card participating in the simulation. The GTFPGA Unit has versatile functionality, with different firmwares that can be run on the hardware for different purposes. Additional functionality for the GTFPGA Unit is currently under development.