  We present three-epoch multiband ($V_{606}$, $i_{775}$, $z_{850}$)
measurements of galaxy shapes using the ``polar shapelet'' or
Laguerre-expansions method with the Hubble Space Telescope ($HST$) Advanced
Camera for Surveys (ACS) data, obtained as part of the {\it Great Observatories
Origin Deep Survey} (GOODS). We take advantage of the unique features of the
GOODS/ACS Fields to test the reliability of this relatively new method of
galaxy shape measurement for weak lensing analysis and to quantify the impact
of the ACS Point Spread Function (PSF) on $HST$/ACS data. We estimate the bias
introduced by the sharp PSF of the ACS on shape measurement. We show that the
bias in the tangential shear due to galaxy-galaxy lensing can be safely
neglected provided only well-resolved galaxies are used, while it would be
comparable to the signal level (1--3%) for cosmic shear measurements. These
results should of be general utility in planning and analyzing weak lensing
measurements with $HST$/ACS data.
