We investigate thermal dilepton production in heavy-ion collisions using relativistic second-order Israel-Stewart hydrodynamics within Gubser flow. The Gubser flow considers both the transverse expansion of the viscous medium along with longitudinal boost invariance. The dilepton production is calculated in the presence of shear viscosity using Chapman-Enskog like viscous correction to the particle distribution function. Varying the Gubser parameter q, we find enhanced dilepton production at small values. We also extract effective temperature of hot viscous QCD medium from the transverse mass spectra for different q values.