GORBI relies on the OMA database maintained by the Computational Biochemistry Research Group of the ETH. The algorithm used in the analysis is Hierarchical Multi-label Classification (HMC), part of the Clus predictive clustering framework, available for download from here.
The development of the GORBI web application was funded by the Croatian Ministry of Science, Education and Sport iProjekti scheme, grant #2008-058. Work on obtaining the gene function predictions presented in GORBI was also funded by the Slovene-Croatian bilateral program "Inductive Databases for Genomics and Proteomics", between the Division of Electronics of the RBI (Zagreb, Croatia) and the Knowledge Technologies departments of the IJS (Ljubljana, Slovenia) institutes.