  We consider the possible production of stable lightest first level KK
particle (LKP) in baryonic gamma ray bursts (GRB) out flows. We numerically
computed the energy-dependent cross-sections of Kaluza-Klein (KK) excitations
for the Standard Model gauge bosons, photon and Z. Next, we determined the
feasibility of producing these KK excitations in gamma-ray emitting regions of
GRBs. We found that a GRB fireball that accelerates baryons to energies greater
than 10^14 eV could produce KK excitations out to approximately 10^12 cm from
the central engine, indicating that GRBs may be a significant source of the
LKP. Finally, we explore the potential observational consequences of our
results.
