# zsh interactive shell (just opening a terminal window)
╰○ env | egrep "^(GEM_|PATH)"
PATH=/home/brad/.nvm/versions/node/v6.9.0/bin:/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# RubyMine terminal (should be identical to zsh interactive shell)
╰○ env | egrep "^(GEM_|PATH)"
PATH=/home/brad/.nvm/versions/node/v6.9.0/bin:/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# zsh login shell
╰○ zsh -lc "env | egrep \"^(GEM_|PATH)\""
PATH=/home/brad/.rbenv/shims:/home/brad/.nvm/versions/node/v6.9.0/bin:/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
╰○ /usr/bin/zsh --login -c "env | egrep \"^(GEM_|PATH)\""
PATH=/home/brad/.rbenv/shims:/home/brad/.nvm/versions/node/v6.9.0/bin:/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# RubyMine "Run anything" commmand (should be identical to zsh login shell)
/usr/bin/zsh --login -c "env | egrep \"^(GEM_|PATH)\""
PATH=/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# bash login shell
╰○ bash -c "env | egrep \"^(GEM_|PATH)\""
PATH=/home/brad/.nvm/versions/node/v6.9.0/bin:/home/brad/.rbenv/shims:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# Is GEM_PATH set anywhere?
╰○ egrep -r "^GEM_" ./*
(no output)
# WHAAAAAAT?