I am trying to obtain gene sets to perform gene set enrichment analysis and I am struggling to find gene sets for my organism, Bacillus subtilis. I've read in peer-reviewed papers that people working with my organism have been able to perform gene set enrichment analysis and some said they obtained gene sets from KEGG. I've looked through KEGG and haven't really been able to figure out how to find gene sets that are compatible with GSEA. I'm aware of MsigDB, but this appears to only provide gene sets for a small number of model, primarily eukaryotic, organisms.
Can anyone assist me in obtaining gene sets for Bacillus subtilis?