Domestique for who though? This team (FDJ) has had an obsession with French GC leaders for as long as I remember. I do believe it's the main goal of the sponsor, aka a French rider doing well in GC in the Tour.
Gaudu is now about to experience the next level of pressure, i.e. if anyone thinks that just because his GC is dead, he can ride with a 'free spirit', think again, i.e. now is exactly the time people are going to expect a stage win from a breakaway.
Honestly I don't think he's anywhere near capable of delivering that either. So his stock is falling rapidly (& has been for two years now).