How do I get my structured grid out of Gridgen into my own solver?
Use the Generic flow solver setting which will produce a Plot3D formatted grid file and an ascii boundary condition file. Or the new CGNS-Struct flow solver setting can be used to export data formatted according to the CGNS standard. Use Export Analysis Data to have Gridgen write out the files. See Chapters 4 and 30 in the User Manual for more information.