The electron bandstructure for gallium phosphide (zincblende structure) was calculated using the program Quantum Espresso (version 5.3.0). GaP is a compound semiconductor material with an indirect bandgap of 2.26 eV. The calculated bandgap (1.82 eV) is a little smaller than comparative values. (cf. ioffe) .
Zincblende structure of GaP Source: Wikipedia
Density of states