I read \"Relationships between Rubygems, Bundler, and RVM\" before asking it again.
Well, there are many questions like this, but people who answered say they work
echo $GEM_HOME in a terminal.echo $GEM_HOME now would show a path into your RVM install.$GEM_HOME, or, if you specify a path when running bundle install will be installed to that path. To find out where a gem is through Bundler you can use bundle show gemname to get its full path.