  Scalar fields coupled to the Gauss-Bonnet invariant evade the known no-hair
theorems and have nontrivial configurations around black holes. We focus on a
scalar field that couples linearly to the Gauss-Bonnet invariant and hence
exhibits shift symmetry. We study its dynamical evolution and the formation of
scalar hair in a Schwarzschild background. We show that the evolution
eventually settles to the known static hairy solutions in the appropriate
limit.
