I like the atmosphere there, and the very calm surroundings. Whenever I feel a bit stressed, I just trade there, or supply my PoB there. Once people start using Gallia (if at all), it will surely be a very good place to play in, and they will realise that. There are a few minor problems though, like the exorbitantly huge systems (shrink them down a bit) and some of the useless systems there. And lack of mining fields can be pointed out as a very good problem, since that makes it devoid of trader activity (constant trader activity). Which in turn has its toll on pirates, lawfuls and the quasi lawfuls there.
My suggestion would be to boost the trading activity inside Gallia, if you want any activity inside it. Traders are the starting grid in the cycle of activity.