Open burner models will have a lift up top for easy cleaning. Gas ranges require an electric line. The range requires a 110V line for the electronic ignition. The industry is phasing out pilot lights in gas ranges. They are still available in smaller less featured ranges.
Gas ranges come in a variety of colors.
In purchasing a gas range be sure to measure your cookie sheets to see if they will fit in your new oven cavity. Some manufacturers are making a duel fuel gas range. This will be a gas cooking surface and an electric oven. You can also get an electric convection oven. Measure your current wall oven dimension.