and as for GCaMP 2P spectrum, i double checked... there's no record in the revision history of GCaMP ever having a 2P spectrum. In any case, the answer to "is there a way to add"... is always that users can always submit spectra at www.fpbase.org/spectra/subm...
fpbase.org
FPbase: The Fluorescent Protein Database
FPbase is a free and open-source, community-editable database for fluorescent proteins and their properties.