Almost everyone is welcome in Gallia if they abide by the law.
And whoever reads the laws will find that only traders need a visa. (§3.5) So if I have a 5k transporter as a policeman who can make InGame clear to me (keyword role play) that he is only here to look at the area does not need a visa. Even if you play a Gallic Freelancer, you don't need a Visa, any more than you do Gallic Corperations.
And that users of infrastructure such as tradelanes and jump gates have to pay for the maintenance costs is normal for roads even in many countries on earth.