Catalyzes the 2-beta-hydroxylation of several biologically active gibberellins (GAs), leading to the homeostatic regulation of their endogenous level (PubMed:18952778, PubMed:24475234). Catabolism of GAs plays a central role in plant development (PubMed:18952778, PubMed:24475234). In vitro, converts GA12 and GA53 to the corresponding 2-beta-hydroxylated products GA110 and GA97, respectively (PubMed:18952778). 2-oxoglutarate + gibberellin A1 + O2 = CO2 + gibberellin A8 + succinate Binds 1 Fe(2+) ion per subunit. Plant hormone biosynthesis; gibberellin biosynthesis. Expressed in roots, leaves, culms, leaf sheaths and young panicles. Plant overexpressing GA2OX5 exhibit an extremely dwarf phenotype. Belongs to the iron/ascorbate-dependent oxidoreductase family. GA2OX subfamily.