Theres plenty wrong with Gallia, its overly big (huzzah for the shrinkage) quite intimidating and not really well received. I think its main issue is the isolationist RP its been given and those huge minefields aren't exactly a welcome sign, I can't tell you how many times I thought of making a Gallic smuggler when the thought of those minefields spring up its a definite "I can't be bothered" moment and put me off completely. Not to mention the tradelanes are like fortresses with quite powerful NPCs so being unlawful has a huge downside and thats not considering the distances between jumpholes.
I'd propose a jumpgate in Dauphine to the taus or even Kyushu, or in the least a straight path through the minefields with smaller ways cleared for unlawful access, some way of making Gallia accessable.
Another suggestion is to do with smuggling, according to lore the Gallians are nuts for artifacts and the elite love their vices (read drugs) perhap make Gallia the new "hot spot" instead of Liberty, raising the buy price by 1 - 1500k (or even more if the freighter only routes are used.)
Thirdly, we just need people to dive in, I made a gallic liner who runs refugees and had a whale of a time in New York, granted my first time I ran into some pirates who asked for a lot of money completely ignoring the RP and offers of a small sum but nothing is ever perfect non?