  We study slow-roll inflation with a Gauss-Bonnet term that is coupled to an
inflaton field nonminimally. We investigate the inflationary solutions for a
specific type of the nonminimal coupling to the Gauss-Bonnet term and inflaton
potential both analytically and numerically. We also calculate the observable
quantities such as the power spectra of the scalar and tensor modes, the
spectral indices, the tensor-to-scalar ratio and the running spectral indices.
Finally, we constrain our result with the observational data by Planck and
BICEP2 experiment.
