Yes, it is a GP 700 E-engine and your next point.
Fuel injection engines were introduced at Goliath in the GP 700 E Sport in 1951. From the end of 1952, this engine was also available in the sedan, GP 700 E. In 1955, the displacement was increased to 900 cc, and this version was also available with a fuel-injected engine, GP 900 E. The 700 was then only available with a carburettor, GP 700 V. In 1957, the company switched to four-stroke engines: Goliath GP 1100.