MXD3D has built a series of software tools to simplify the process of creating 3D printable content. They're the creators of 3D printing technology such as Gameprint and MakePrintable. Now with G-Code Reverser from MakePrintable, a tool which interprets G-code, collects the necessary details and data from those commands and “regenerates” a 3D model to represents the outcome of the printing process, the makers say their software will allow users to simplify changing various settings and targeting other printers. You can read the whole story here: http://3dprint.com/66723/g-code-reverser/
Below is a screengrab from the G-code Reverser process: