  We reconsider the stochastic gravitational wave background spectrum produced
during the first order hadronization process, in presence of ultraviolet
cutoffs suggested by the generalized uncertainty principle as a promising
signature towards the Planck scale physics. Unlike common perception that the
dynamics of QCD phase transition and its phenomenological consequences are
highly influenced by the critical temperature, we find that the underlying
Planck scale modifications can affect the stochastic gravitational spectrum
arising from the QCD transition without a noteworthy change in the relevant
critical temperature. Our investigation shows that incorporating the natural
cutoffs into MIT bag equation of state and background evolution leads to a
growth in the stochastic gravitational power spectrum, while the relevant
redshift of the QCD era, remains unaltered. These results have double
implications from the point of view of phenomenology. Firstly, it is expected
to enhance the chance of detecting the stochastic gravitational signal created
by such a transition in future observations. Secondly, it gives a hint on the
decoding from the dynamics of QCD phase transition.
