Gagatophorus tibialis is a weevil in the Amycterini tribe of the Curculionidae family, endemic to Western Australia.
The species was first described by Eustace William Ferguson in 1914 as Macramycterus tibialis, from a specimen collected at Shark Bay, Western Australia, and was transferred to the genus, Gagatophorus, in 1993 by Elwood Curtin Zimmerman.