I feel that this project is very different from Martini from the low-level point of view. While Martini uses reflection to find how to use handlers, Gin utilizes a static context system. Reflection being really one of the core properties of Martini and the key part of its simplicity, this kind of changes would get rejected.

In the same kind of Martini-like web frameworks that don't use reflection, there is also Goji - http://goji.io.