  Gravitational lensing of gamma-ray bursts (GRBs) can provide an opportunity
to probe the massive compact objects in the universe at different redshifts. We
have discovered two consecutive pulses in the light curve of GRB 090717034,
with the same temporal profile and different count rate, separated by a time
interval, which is identified as gravitationally lensed candidate in Fermi/GBM
GRB catalogue \citep{Kalantari}. Here, we use the $\chi^2$ method to
investigate the similarity of the temporal profile variability of the two
pulses as a gravitationally lensed candidate GRB. We find the magnification
factor and the time delay between two pulses to correspond to minimising the
$\chi^2$ function. Then, we perform a Monte Carlo simulation on a sample of
mock lensed GRBs and compare the $\chi^2$ of the lensed GRB candidate with the
simulation, which confirms this candidate with $1\sigma$ confidence level.
Assuming that GRB 090717034 is lensed by a point-like object, the redshifted
lens mass is about $M_L(1+z)=(4.220\pm 6.615) \times 10^6 M_{\odot}$. The lens
of this GRB is a candidate for a super-massive black hole along the line of
sight to the GRB.
