avo author here. Yes PeachPy was the inspiration for this, as well as asmjit. Both mentioned in the credits:

https://github.com/mmcloughlin/avo#credits

PeachPy actually has Go output already, and Damian Gryski has used this to great effect:

https://github.com/mmcloughlin/avo/issues/40

Unfortunately because PeachPy wasn't initially written with Go in mind there are some rough edges and Go features it simply doesn't support. avo hopes to fill this gap for Go programmers.