  We study the signals and backgrounds for a heavy Higgs boson in the processes
$\gamma\gamma\to WWWW$, $\gamma\gamma\to WWZZ$ at the photon linear collider.
The results are based on the complete tree level SM calculation for these
reactions. We show that the invariant mass spectrum of central $WW$, $ZZ$ pairs
is sensitive to the signal from Higgs boson with a mass up to 1~TeV at a 2~TeV
linear collider for integrated luminosity of 300~fb$^{-1}$. At 1.5~TeV PLC
Higgs boson with a mass up to 700~GeV can be studied. The nonresonant
longitudinal gauge boson scattering ($m_H=\infty$) can be detected in
photon-photon collisions at $e^+e^-$ center-of-mass energy of 3~TeV.
