Grand Unified Theories (GUT) offer an elegant and unified description ofelectromagnetic, weak and strong interactions at high energy scales. Aphenomenological and exciting possibility to grasp GUT is to search for TeVscale observables arising from Abelian groups embedded in GUT constructions.That said, we use dilepton data (ee and $\mu\mu$) that has been proven to be agolden channel for a wide variety of new phenomena expected in theories beyondthe Standard Model to probe GUT-inspired models. Since heavy dileptonresonances feature high signal selection efficiencies and relativelywell-understood backgrounds, stringent and reliable bounds can be placed on themass of the $Z^{\prime}$ gauge boson arising in such theories. In this work, weobtain 95\% C.L. limits on the $Z^{\prime}$ mass for several GUT-models usingcurrent and future proton-proton colliders with $\sqrt{s}= 13~{\rm TeV},\,33~{\rm TeV},\,{\rm and}\, 100$~TeV, and put them into perspective with darkmatter searches in light of the next generation of direct detectionexperiments.
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