GMC made some tractors back in the 1920's . They were called a samson at first and then la few years later the same tractor was called a samson/gmc.
They were about 3 times more expensive as there competor the fordson. So they were not made but about 6 years.
Pictures of my 1953 John Deere 40, I got it from my best friends family. I am the second owner of it.