  Broadband microwave spectroscopy has been performed on single-crystalline
GaV$_4$S$_8$, which exhibits a complex magnetic phase diagram including
cycloidal, N\'eel-type skyrmion lattice, as well as field-polarized
ferromagnetic phases below 13 K. At zero and small magnetic fields two
collective modes are found at 5 and 15 GHz, which are characteristic of the
cycloidal state in this easy-axis magnet. In finite fields, entering the
skyrmion lattice phase, the spectrum transforms into a multi-mode pattern with
absorption peaks near 4, 8, and 15 GHz. The spin excitation spectra in
GaV$_4$S$_8$ and their field dependencies are found to be in close relation to
those observed in materials with Bloch-type skyrmions. Distinct differences
arise from the strong uniaxial magnetic anisotropy of GaV4S8 not present in
so-far known skyrmion hosts.
