G. concinna may refer to:
Gagrella concinna, a joint-legged animal Gavia concinna, an extinct loon Gemmula concinna, a sea snail Gentianella concinna, a flowering plant Geonoma concinna, a New World palm Glossopsitta concinna, an Australian lorikeet Goodenia concinna, a flowering plant Goplana concinna, a rust fungus Grevillea concinna, a Western Australian shrub Griffinia concinna, a monocotyledonous plant Guignardia concinna, a sac fungus Gymnoscelis concinna, a geometer moth