  Parametrized Post-Newtonian (PPN) equations of motion for several S-stars
nearest to the Galactic Center compact relativistic object SgrA* are
considered. The effect of the orbital periods difference between Newtonian and
Post-Newtonian cases is taken into account. The best fit PN orbit of S2 has a
period which is 16 days longer than Newtonian one. The PPN parameters
$\beta_\text{PPN}$ and $\gamma_\text{PPN}$ are measured. Bayesian sampling is
used to fit the trajectories of the PPN laws of motion. Posterior estimates of
$\beta_\text{PPN}$ and $\gamma_\text{PPN}$ are $0.97^{+0.42}_{-0.65}$ and
$0.81^{+0.46}_{-0.60}$ respectively. The result confirms General Relativity
prediction for the Post-Newtonian equations of motion in the conditions of
orbital motions in vicinity of the SgrA*.
