With Laragon 3.1, working with Rails is a pleasure. Just install the Laragon - RubyOnRails edition, then open Terminal (Menu > Laragon > Termial) and type:gem install rails
If you want to install a specific version of Rails, type:gem install rails -v 5.0.3
Working with Rails:Create an app: rails new coolapp Start it: cd coolapp rails s
That's all fork!
Note: with Laragon, you can work with different version of Rails - just add another ruby version:
How to add another Ruby version