Are GRE scores useful in making some graduate admissions decisions?
ETS has quite a bit in defense of the predictive value.  Of course, take it with a grain of salt.  Still, I think you will find less issues with range restriction in their studies (or studies they cite).

https://www.ets.org/gre/research/validity_evidence_predicting_grad_success

https://news.ets.org/stories/gre-test-validity-putting-it-in-perspective/

https://www.ets.org/Media/Research/pdf/GREB-75-08R.pdf