Just not in C++ code. gprc has a bajillon dependencies, and upgrades are a major pain. If you have a dedicated build team and they are willing to support this - sure, go ahead and use it.

But if you have multiple targets, or unusual compilers, or don't enjoy working with build systems, stay away from complex stuff. Sure, REST may need some manual scaffolding, but no matter what your target is, there is a very good chance it has JSON and HTTP libs.