If you are on a slab ( houses in DE don't have basements?) then the line would have to go up through the walls, across the ceiling or in the attic, and down through the wall again. It is very doable.
Now, mosy folks on here will recommend against any DIY gas work...too much downside.
Depending on your local laws, in many areas homeowners ARE allowed to do this. All of the following will be true:
1) A permit from city is mandatory.
2) Pulling the permit will then require you to put a test on the line, and get it inspected, before the city will allow the gas to be turned on.
3) Homeowners do not have the expensive tools to cut and thread black iron pipe. **********s will do this for you, with varying quality.
It would probalby not break your bank to have a licensed plumber do the work.