  Recent discovery of 2D van der Waals (vdW) magnetic materials has spurred
progress in developing advanced spintronic devices. A central challenge lies in
enhancing the spin-conversion efficiency for building spin-logic or spin-memory
devices. We systematically investigated the anomalous Hall effect and anomalous
Nernst effect in above-room-temperature van der Waals ferromagnet FeGaTe with
perpendicular anisotropy, uncovering significant spin-conversion effects. The
anomalous Hall effect demonstrated an efficient electric spin-charge
conversion, with a notable spin Hall angle of 6 $\%$ - 10.38 $\%$. The
temperature-dependent behavior of the anomalous Nernst voltage primarily
results from the thermo-spin conversion. Uniquely, we have experimentally
achieved thermo-spin polarization values of over 690 $\%$ at room temperature
and extremely large of 4690 $\%$ at about 93 K. This study illuminates the
potential of vdW ferromagnets in advancing efficient spin conversion devices.
