  The relevance of measuring Generalized Parton Distributions (GPDs) of nuclei
is stressed and the unique possibilities offered by nuclear few body systems is
emphasized. A realistic microscopic calculation of the unpolarized quark GPD
Hq3 of the 3He nucleus is reviewed. Nuclear effects are found to be larger than
in inclusive deep inelastic scattering, flavor dependent, increasing with the
momentum transfer and the asymmetry of the process. They also depend on the
choice of the realistic potential. Besides, it is found that nuclear GPDs
cannot be factorized into a Delta^2-dependent and a Delta^2-independent term,
as suggested in prescription proposed for finite nuclei.
