Or you could replace the damaged tubing with a flexible stainless connector as shown here.
Copper gas line in attic.
If the flare fitting on the flexible stainless gas line matches the size of the flare fitting on the existing gas valve you can simply screw it on.
Copper offers a relatively inexpensive material for service line composition.
In other areas the use of copper is widespread.
In some areas it is legal to use flexible copper tubing w flared connections for gas.
There were problems w old style galvanized iron pipes for that reason.
It was run in an unprofessional manner in that it runs up from the basement and then along a door threshold and finally through a wall.
I have just purchased a house where the gas line for the dryer is copper.
Copper has the ability to be formed in long service line coils.
Are there any rules or safety concerns about running a new gas through the wall into the attic and then dropping it down through the wall.
The most common gas piping is black steel.
But it is commonly used these days.
You could cut a new length of coiled soft copper flare the ends and connect it with flare fitting.
The laundry room is built on a slab.
You should know what is acceptable in your area.