Crystal structure, magnetic and vibrational properties of KGd(WO4)2 crystals and powders in dependence on temperature were studied. EPR and Raman spectroscopy as well as crystallographic measurements were applied. Results of the Raman and crystallographic measurements do not point out any structural transition up to 4 K. The EPR spectra of KGd(WO4)2 single crystal recorded in ab, bc and ac planes in temperature range 8-300 K are broad and reveal complex shape. Two approximations were used to describe magnetic interactions inside the crystal: diluted medium and concentrated one. Detailed...