But on topic. Were the Stargate to be made public, and avalible for use for colonists etc. This is how I would like to see it. This is assuming the Ori will be defeated and there will be no MAY(J)OR badasses out to get us out there.
The gate should be open to the public, and funded by the international community with a dedicated taskforce to neutralize any military threat coming through the gate. The gate is located inside an bunker, and all incoming cargo or people are screened before the blastdoors are opened.
However once through the "Gateport" is an normal public place. The gate is dedicated mostly for civilian use, with the govs and military having to book time just like anyone else. Certain popular desinations are being served on a regular schedule. Maybe every day at 17.30 the Gate is open for 25 minutes to Chulak, just as an example. Between every outgoing wormhole there is atleast an 40 minute break, for enscheduled incoming wormholes.
Any group over 50, or with the backing of a goverement, are able to book a Gatetime.
Earth's Gateport would serve as an hub for humans all over the galaxy, as people move between colonies. Exotic items can be bought from every planet within the gate network. Scientific expeditions are daily coming and going. Settlers in the thousends stream out in the galaxy to form independent worlds. There can be a christian planet, a muslim planet, a nazi planet and a frelling Disney Planet. With total freedom bad goverements, as well as good and non-existant ones flourish. There is no unity in the galaxy, but a patchwork of competing systems, each vying for dominance. Well, as I see it it's either that or an totalitarian Terran Empire.