  It is well established now that the generalized parton distributions (GPDs)
at zero skewness are playing important roles in some physical process such as
elastic electron-nucleon scattering, elastic (anti)neutrino-nucleon scattering,
and wide-angle Compton scattering (WACS) via various types of form factors
(FFs). In this study, we are going to utilize the recent JLab measurements of
the elastic electron-nucleon scattering reduced cross-section, namely GMp12, as
a touchstone to unravel the tension observed between the measurements of the
WACS cross-section and the data of the proton magnetic FF $ G_M^p $. We also
investigate the impact of GMp12 data on valence unpolarized GPDs $ H_v^q $ and
$ E_v^q $ at zero skewness by performing some $ \chi^2 $ analyses of the
related experimental data. By calculating the electric and scalar quadrupole
ratios, $ R_{EM} $ and $ R_{SM} $, and magnetic transition FF $ G^*_M/3G_D $
related to the nucleon-to-delta ($ N\rightarrow \Delta $) transition using the
extracted GPDs and comparing the results with corresponding experimental
measurements, we show that our results are in an excellent consistency with
experiments, indicating the universality property of GPDs. We emphasize that
the inclusion of these data in the future analysis of GPDs can significantly
affect the extracted GPDs especially their uncertainties at smaller values of $
Q^2 $.
