  We study the constraints on the new parameters in the gauge sector of gauged
two Higgs doublet model using the electroweak precision test data collected
from the Large Electron Positron Collider (LEP) at and off the Z-pole as well
as the current Drell-Yan and high-mass dilepton resonance data from the Large
Hadron Collider (LHC). Impacts on the new parameters by the projected
sensitivities of various electroweak observables at the Circular Electron
Positron Collider (CEPC) proposed to be built in China are also discussed. We
also clarify why the St\"{u}eckelberg mass $M_Y$ for the hypercharge $U(1)_Y$
is set to be zero in the model by showing that it would otherwise lead to the
violation of the standard charge assignments for the elementary quarks and
leptons.
