Yeah seriously there should be something realy worth mineable or a commodity from Gallia to Sirius. I could even imagine that it'd raise activity there and it'd be a hell lot of an adventure, imagine everywhere RED and HOSTILE you have to dodge and nice turret steer to avoid getting destroyed, in the end you arrive in Sirius with a nice cash that was totaly worth it . It's like ultimate smuggling from Gallia.
In seriousness; I've been in Solar Engineering for a short time (think we even applied for officialdoom then), but it's common sense that Gallic Corps fail hard as there's honestly nobody who loses his way into Gallia.
If it's just about trading in Gallia AND Sirius at once - either use Freelancer ID or join IND?