Involved in the rescue of ribosome stalling due to the presence of non-functional tRNA (By similarity). Has very low GTP- binding activity (PubMed:30108131). {ECO:0000250|UniProtKB:Q3UJK4, ECO:0000269|PubMed:30108131}. This is the function of ENSG00000172432 (GTPBP2, GTP binding protein 2).