There seem to be big appreciation for go language. How difficult is it to develop a language with (mostly) python syntax while keeping the performance of go?

There seem to be big appreciation for go language. How difficult is it to develop a language with (mostly) python syntax while keeping the performance of go? I guess most people who use python use it because of its aesthetics and might even never heard of the GIL issue in python, so i guess among all languages the python syntax is the most liked one.