http://www.tiobe.com/tiobe-index/
A Github search turned up 2,658 Go repositories with more than 100 stars:
https://github.com/search?l=go&q=stars%3A%3E100&type=Reposit...
compared to 348 Rust repositories:
https://github.com/search?l=rust&q=stars%3A%3E100&type=Repos...
Notably, Docker has more stars than Go itself.
Edit: you may also be interested in IEEE Spectrum's interactive list of the top programming languages:
http://spectrum.ieee.org/static/interactive-the-top-programm...
With the default parameters, Go and Rust are 10 and 26, respectively.