Gatso was a Dutch car company founded just after the Second World War in 1948 by Dutch racing driver and inventor Maus Gatsonides. Originally he wanted to call his company Gatford, but, according to Ford, this name was too similar to the French word “matford”; so they forced Gatsonides to change the name of his company. Because the company went bankrupt after only a couple years, they only managed to build two models: the 4000 and the 1500. The car was initially meant to compete in rally championships. Due to the car being very sturdy, it was ideal for the big and tough rallies where cars often had to drive for several days straight. The car was powered by a big 4.0L V8. https://www.carthrottle.com/news/gatso-brand-no-one-knows-blogpost https://classiccarcatalogue.com/GATSO_1948.html
Kay Petre - Born in Canada but living in England, Kay was an early motor racing star at the legendary Brooklands track
Evelyn Mull was one of the fastest of the many women drivers active on the US sportscar scene in the 1950s.
Anything’s possible, so it might be Chicago but the car on the left has a Missouri plate and the ‘32 Chevy has a Nebraska plate.