In this study, the reversible response of $I_{\rm c}$ with uniaxial strain in differently processed GdBCO coated conductor tapes with different substrates has been investigated under self field and magnetic field conditions at 77 K. Higher irreversible strain limit, $\varepsilon_{\rm irr}$ was observed in those samples with stainless steel substrate. Additional brass lamination to the Cu-stabilized samples produced enhancement of both $\varepsilon_{\rm irr}$ and endurable load limit. However, no significant widening of the $I_{\rm c}/I_{{\rm c}0}$-tensile strain window with brass addition was observed in the case of samples having stainless steel substrate. Furthermore, under magnetic field, the $I_{\rm c}$ degradation behavior was independent on the kind of substrate material, but varied with the kind of manufacturing process adopted. The GdBCO samples showed different $I_{\rm c}$ peak positions and degradation behavior depending on the level of magnetic field applied.