I would consider using the Optimo package for this. Optimo is a multi objective genetic algorithm solver. It’s not exactly as user-friendly as Galapagos, but it works pretty good. This can be used in combination with Robot. For some references, see here: https://revitbeyondbim.wordpress.com/tag/optimo/
and my own take on this, however silly example…: http://jbdynamo.blogspot.no/2016/04/dynamo-and-optimo-optimizing-your-carl.html
See also this thread: Learning Optimo + Robot Structural Analysis
React is not continued, so I wouldn’t put my eggs in that basket.