Yes BCC will Back Plot G-Code files. If it is saved as an NC or CNC File Extention BCC will follow the Tool Path with the Cursor or Tool Simulation. If it is a Text file BCC will Back Plot it but won't follow with the Cursor or Tool.
How confusing did that sound????
The Best Back Plotter on the Market is NC Plot www.ncplot.com I use this in place of BCC's Simulator because I do a lot of Sub-Programming and funky shapes.