  We study quantum corrections at the horizon scale of a black hole induced by
a Generalized Uncertainty Principle (GUP) with a quadratic term in the
momentum. The interplay between quantum mechanics and gravity manifests itself
into a non-zero uncertainty in the location of the black hole radius, which
turns out to be larger than the usual Schwarzschild radius. We interpret such
an effect as a correction which makes the horizon disappear, as it happens in
other models of quantum black holes already considered in literature. We name
this kind of horizonless compact objects $GUP stars$. We also investigate some
phenomenological aspects in the astrophysical context of binary systems and
gravitational wave emission by discussing Love numbers, quasi-normal modes and
echoes, and studying their behavior as functions of the GUP deformation
parameter. Finally, we preliminarily explore the possibility to constrain such
a parameter with future astrophysical experiments.
