Some really exciting new features to be activated in the next public build of the Rhino/Grasshopper plugin connecting to Oasys GSA that will allow generation of a complete Structural Analysis model within Grasshopper including loads, materials, analysis tasks and solver controls. This will allow form finding of membrane and tensegrity structures incorporating advanced structural attributes including loads, with realistic materials.
This will not be real time "dynamic" response such as kangaroo physics plugin (which at present can not perform at real time speeds with realistic materials and stiffness).
Interrogating and utilizing analysis results will also be enabled, including more conventional models and frames.
If you have requests/suggestions for this release don't hesitate to get in touch. Other popular solvers including SAP2000, Robot and Strand7 are expected to follow in the near future.
I'll shortly be posting more detailed instructions, but for the time being you can download the grasshopper definition from here : Grasshopper Definition You'll need latest Plugin for GSA from http://www.geometrygym.com/downloads