Standard Horizon - GX1400G Fixed Mount VHF with GPS - Black - GX1400GB. Easy DSC Installation!. The GX1400G makes DSC easy. With an internal 66 Channel GPS built into the front panel, there is no need to hassle with wiring the radio to a GPS for DSC. Out of the box and ready to go, DSC calling and position sharing can both be performed with just a few simple steps.. ITU-R M493-13 Class D Digital Selective Calling. The GX1400 Eclipse Series is an ITU-R M493-13 Class D class VHF with a separate Ch