I think that a Westinghouse gas stove must have come after the buy out (or sell out, depending on how you view it) by WCI which would have brought gas range manufacturers into the fold, but I kind of doubt that since there was no service literature for them. More likely, since this is in an apartment, it could be that the other appliances were originally Westinghouse and Westinghouse offered a builders' package that substituted a gas stove from another manufacturer which was then labeled Westinghouse. When the company was Westinghouse, they did not offer gas dryers until the flat front dryers introduced with the EASY-made top load washer.
Appliances are very much a side line for GE now. Power generation is a large part of their business. It seems that power generation would not be that poor a match for a company with "Electric" in its name and gas turbines are one of the cleanest ways to generate electricity.
As for General Electric gas ranges, those are made by Tappan in Mexico where lots of appliances were made before being made in Asia. Whirlpool has a factory that makes the Duet Sport in Mexico and is moving Duet production to Mexico as well, according to John, to bring down production and shipping costs.
Early Frigidaire gas dryers had the burner at the top of the cabinet on the right hand side, I think. One of John's customers had the Custom Imperial pair from 61 or 62 in pink. One time the gas valve stuck open after the dryer shut off. When she smelled something very hot, the owner ran downstairs and had one of her sons help turn off the gas. The whole top of the dryer had turned absolutely black, but as it cooled, it turned pink again. You gotta love porcelain.