  We consider the electromagnetic (EM) response of a Gaussian beam passing
through a static magnetic field to be the high-frequency gravitational waves
(HFGW) as generated by several devices discussed at this conference. It is
found that under the synchroresonance condition, the first-order perturbative
EM power fluxes will contain a ''left circular wave'' and a ''right circular
wave'' around the symmetrical axis of the Gaussian beam. However, the
perturbative effects produced by the states of + polarization and \times
polarization of the GW have a different physical behavior. For the HFGW of
$\nu_{g}=3GHz$, $h=10^{-30}$ (which corresponds to the power flux density $~
10^{-6} W m^{-2}$) to $\nu_{g}=1.3THz$, $ h=10^{-28}$ (which corresponds to the
power flux density $~10^{3} W m^{-2}$) expected by the HFGW generators
described at this conference, the corresponding perturbative photon fluxes
passing through a surface region of $10^{-2} m^{2}$ would be expected to be
$10^{3} s^{-1} - 10^{4} s^{-1}$. They are the orders of magnitude of the
perturbative photon flux we estimated using typical laboratory parameters that
could lead to the development of sensitive HFGW receivers. Moreover, we will
also discuss the relative background noise problems and the possibility of
displaying the HFGW. A laboratory test bed for juxtaposed HFGW generators and
our detecting scheme is explored and discussed.
