ggRhinoIFC 1.3.21 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free program is Geometry Gym Pty Ltd. GgRhinoIFC is included in Photo & Graphics Tools. The following versions: 1.3, 1.2 and 1.0 are the most frequently downloaded ones by the program users. We recommend checking the downloaded files with any free antivirus.
From the developer:
ggRhinoIFC is a plugin that enables model exchange between Rhino/Grasshopper and other IFC capable application. The plugins are released for latest Grasshopper, version 0.9.0051 or newer. Commercial users need to have a trial license to run this app; students/academics can request free access to the tools.
You may want to check out more software, such as Smart Map, stCAD or eDrawings for SketchUp, which might be related to ggRhinoIFC.