Constraining GUP Models Using Limits on SME Coefficients

In this work, I outline recent efforts to constrain models based on GUPs using limits on coefficients of the Standard-Model Extension. Two main results are reported: (1) bounds on isotropic GUP models are improved by a factor of 10⁷ compared to previous spectroscopic bounds; and (2) anisotropic GUP models are established and also constrained.