  We study $\rho$ meson unpolarized generalized parton distributions based on a
light-front constituent quark model where the quark-antiquark-meson vertex is
constructed under the symmetric loop momentum convention. The form factors and
some other low-energy observables of the $\rho$ meson are calculated. Moreover,
the contributions to the form factors and generalized parton distributions from
the valence and nonvalence regimes are discussed and analyzed in detail. In the
forward limit, the usual structure functions are estimated as well. In
addition, by evolving the moments of the obtained structure functions to the
scale of the lattice calculation, we give the factorization scale of our quark
model. It is found that the present phenomenological model is reasonable to
describe the general properties of $\rho$ meson.
