The SI unit for gyromagnetic ratio is radian per second per tesla: $\mathrm {rad \, s^{-1} \, T^{-1} }$ (equivalent to coulomb per kilogram: $\mathrm {C \, kg^{-1} }$).
The CGS unit for gyromagnetic ratio is radian per second per gauss: $\mathrm {rad \, s^{-1} \, Gs^{-1} }$.