fuuu ~ % tail /etc/rvmrc
# Setup default configuration for rvm.
# If an rvm install exists in the home directory, don't load this.'
if [[ ! -s "$HOME/.rvm/scripts/rvm" ]]; then
  umask g+w
  export rvm_selfcontained=0
  export rvm_prefix="/usr/local/"
fi

export rvm_gem_path=$HOME/.rvm/gem

fuuu ~ % rvm gemdir
/usr/local/rvm/gems/ruby-1.9.2-p136
fuuu ~ % echo $GEM_PATH
/usr/local/rvm/gems/ruby-1.9.2-p136:/usr/local/rvm/gems/ruby-1.9.2-p136@global
fuuu ~ % echo $GEM_HOME
/usr/local/rvm/gems/ruby-1.9.2-p136