G. grandis may refer to: Gahnia grandis, a perennial plant species found in southeastern Australia and Tasmania Geosaurus grandis, an extinct marine crocodyliform species that lived during the Late Jurassic to the Early Cretaceous Gilbertsmithia grandis, an alga species in the genus Gilbertsmithia Glechoma grandis, a flowering plant species in the genus Glechoma Glirodon grandis, an extinct mammal species found in North America that lived during the Upper Jurassic
See also Grandis (disambiguation)