Under the assumption that a quark-gluon plasma droplet is produced and its evolution can be described by hydrodynamics in p + A collisions, γ-triggered hadron spectra are studied within a next-to-leading-order perturbative QCD parton model with the medium-modified parton fragmentation functions. The initial conditions and space-time evolution of the small QGP droplet are provided by the superSONIC hydrodynamic model simulations and parton energy loss in such a medium is described by the high-twist (HT) approach. The scaled jet transport coefficient q/T 3 in this HT approach is extracted from single hadron suppression in central A + A collisions at the same colliding energy. Numerical results for this scenario show that γ-hadron spectra at p γ T = 12 − 40 GeV/c are suppressed by 5% ∼ 10% in the most central 0 -10% p + Pb collisions at √ sNN = 5.02TeV. The suppression becomes weaker at higher transverse momentum of the γ trigger. As a comparison, γ-hadron suppression in Pb + Pb collisions at √ sNN = 2.76 and 5.02 TeV is also predicted.