  We present the coherent states of the harmonic oscillator in the framework of
the generalized (gravitational) uncertainty principle (GUP). This form of GUP
is consistent with various theories of quantum gravity such as string theory,
loop quantum gravity, and black-hole physics and implies a minimal measurable
length. Using a recently proposed formally self-adjoint representation, we find
the GUP-corrected Hamiltonian as a generator of the generalized Heisenberg
algebra. Then following Klauder's approach, we construct exact coherent states
and obtain the corresponding normalization coefficients, weight functions, and
probability distributions. We find the entropy of the system and show that it
decreases in the presence of the minimal length. These results could shed light
on possible detectable Planck-scale effects within recent experimental tests.
