Yes. The CB-GO61KP can be used to carry and store the GO:KEYS (GO-61K, GO-61KL) and GO:PIANO (GO-61P).
For GO:KEYS3/5 owners: We do not distribute a carrying bag or case for the GO:KEYS3/5. Please refer to this article and find a commercially available one. GO:KEYS 3/5: Is a special carrying bag or case available?