The best thing do with that is not to do it yourself. Call the gas company and they will come out and hook up the gas line for you for no charge.
it does not have to have a separate line from the utility...but it typically has a line running from the already existing line within the home... like remove an elbow from the furnace line and install a tee, then a shutoff valve, then the line to the dryer. After the line arrives in the viscinity of the dryer, it should have another shutoff valve prior to connection to the dryer. Local codes may require additional fittings ot shutoffs... we love our gas dryer... wouldn't have an electric model...
No. An electric dryer has no burner or combustion controls.
Either a fuel line de-icer or a fuel line dryer.
No
A gas hookup will have fittings for a gas line, they should be clearly visible. In an electric hookup there will be an electrical plug, but no gas lines showing.
I guess you technically could but it would be much, much cheaper to just buy a gas fired dryer.
No, a gas dryer uses gas, which cannot be converted into electricity with a simple adapter.
Yes
Typical residential electric dryers are on 30 amp circuits, which means 10 gage copper wire. The circuit breaker should match the dryer cord rating, generally 30 amps.
You close and cap the gas line, and disconnect the vent hose and electrical supply. Depending on the utility and/or code requirements in your area, you may be required to have a licensed plumber or utility mechanic do the actual capping of the gas line. Do NOT just close the valve, unless you intend to reinstall a dryer, but you still might need a licensed plumber. Check with your gas utility before proceeding.
A blocked or clogged dryer vent.
A plumber with a gas ticket.