From Consumer reports:
Electric dryers are the big sellers. Decades of testing revealed that electric and gas dryers perform similarly. We now only test electric models, but their gas versions appear in our Clothes Dryer Ratings because we expect them to perform comparably. An electric dryer requires a 240-volt outlet. For a gas dryer you’ll need a 120-volt outlet and a gas hookup. Gas dryers cost about $50 to $150 more, but you’ll probably spend less on energy and more than make up the difference over time.