Feeding Gonioporas has gotten easier.  Here's a specially formulated food designed for that coral in question, but it also feeds LPS and NPS corals too.  

Goniopower is a new blend of dried zooplankton developed by Justin Credabel as a food for Goniopora, Alveopora, and other suspension feeding marine invertebrates such as soft and stony corals, seafans, anemones, zoanthids, clams, scallops, and featherduster worms. Rich in vitamins, trace elements, amino acids, and lipids.