Gadolinium acetylacetonate is a coordination compound with the formula Gd(C<sub>5</sub>H<sub>7</sub>O<sub>2</sub>)<sub>3</sub>. This anhydrous acetylacetonate complex is widely discussed but unlikely to exist per se. The 8-coordinated dihydrate Gd(C<sub>5</sub>H<sub>7</sub>O<sub>2</sub>)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub> is a more plausible formula based on the behavior of other lanthanide complexes. It has also been characterized twice by X-ray crystallography.
Upon heating under vacuum, the dihydrate converts to the oxo-cluster . This behavior is also observed for europium acetylacetonate, yttrium acetylacetonate, lanthanum acetylacetonate, and erbium acetylacetonate.
Gadolinium acetylacetonate, along with cerium acetylacetonate, can be used as precursors to synthesize gadolinia-doped ceria (GDC) gel powders using the sol-gel method.