The target error threshold provided as input is only used to determine the cubature needed to achieve the desired accuracy. The root mean square error (RMSE) that is calculated is the outcome of comparing the energy and forces computed by GLST to those computed by the Coulomb potential. While the GLST implementation uses double-precision arithmetic to maintain accuracy, we used single-precision trigonometric functions when computing the basis functions. Errors for both single-and double-precision trigonometric can be found in the Supplementary Material. All benchmarking was done using an NVIDIA A100 GPU.