Will it be possible for me to travel from Gennevilliers to Neuilly - Porte Maillot frequently throughout the week frequently by Navigo week pass? Will it be eligible for all- buses, train, metro? Will this card also provide me freedom for travel from Charles de Gaulle Airport to Gennevilliers?
Yes, Navigo week passes by default will cover unlimited trips between Gennevilliers (zone 3) to Neuilly Porte Maillot (zone 1) on RER C or bus plus any other trips of Transilien, RER, Metro, bus, tram you decide to make within the five transportation zones around Paris.
The Navigo pass will also cover Paris to CDG Airport on both RER B and Roissybus (or any other city bus such as bus 350 / 351).