sure, it's totally possible that the advantages of photonics or optoelectronics could win out, and iii–v semiconductors are pretty important for optoelectronics, though not for pure photonic systems like second-harmonic generation. sometimes people even use gaas for that, especially historically

what are iii–v based squid qubits? google scholar is not helpful except for finding https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResea.... i thought a squid was a josephson junction device made out of superconductors and insulators, not semiconductors. gaas isn't a superconductor, is it?

this doesn't sound like a quantum communication and squid research lab though. it sounds like a 50-year-old radar chip fab that's being put on life support as a pork barrel project