  We present results of EVN observations of eleven GHz-Peaked-Spectrum (GPS)
radio sources at 2.3/8.4 GHz. These sources are from the classical ''bright''
GPS source samples with peak flux densities $>$ 0.2 Jy and spectral indices
$\alpha < -0.2$ ($S \propto \nu^{-\alpha}$) in the optically thick regime of
their convex spectra. Most of the target sources did not have VLBI images at
the time this project started. The aim of the work is to find Compact Symmetric
Object (CSO) candidates from the ''bright'' GPS samples. These CSOs play a key
role in understanding the very early stage of the evolution of individual radio
galaxies. The reason for investigating GPS source samples is that CSO
candidates are more frequently found among this class of radio sources. In fact
both classes, GPS and CSO, represent a small fraction of the flux limited and
flat-spectrum samples like PR+CJ1 (PR: Pearson-Readhead survey, CJ1: the first
Caltech--Jodrell Bank survey) and CJF (the Caltech--Jodrell Bank flat spectrum
source survey) with a single digit percentage progressively decreasing with
decreasing flux density limit. Our results, with at least 3, but possibly more
CSO sources detected among a sample of 11, underline the effectiveness of our
approach. The three confirmed CSO sources (1133+432, 1824+271, and 2121$-$014)
are characterized by a symmetric pair of resolved components, each with steep
spectral indices. Five further sources (0144+209, 0554$-$026, 0904+039,
0914+114 and 2322$-$040) can be considered likely CSO candidates. The remaining
three sources (0159+839, 0602+780 and 0802+212) are either of core-jet type or
dominated by a single component at both frequencies.
