|Subject: Tickets for special exhibitions in Paris|
I have checked in the Fnac website ( http://www.fnac.fr ), and I have been able to find tickets for both exhibitions.
Go to spectacles, and do an extended search looking for Paris and Grand Palais or Paris and Luxembourg ( city and salle). I guess the Gauguin exhibition you are looking for is LŽaventure de Pont Aven :))
You will be able to pick up your tickets at any FNAC shop. In order to pick them up, you will need to show them the credit card you used to buy the tickets and a identity proof ( passport, driving license ... ).
Covadonga Bilbao - Spain