GLSDB is, as the “Ground Launched” indicates, not the same thing as an aerial glide bomb, but is instead a warhead for GMLRS rockets fired from launchers like the HIMARS.’

EDIT: OTOH, its based on the SDB, which is a (small, 250lb) glide bomb with decent (40km) range whichthe US has currently only integrated the on the F-15E Strike Eagle, which Ukraine doesn’t have. There’s a long list of other potential future carriers envisioned by the US (including the F-16, which Ukraine will soon be operating), and integrating Western weapons with Soviet-design aircraft has been happening a fair amount in Ukraine, so if the problems affecting GLSDB were solved, SDB would be a real possibility for them, as well.