Rubymine reveal current document in project tree / project drawer

Navigate | Select In, Project View. Shortcut would depend on keymap, default is Alt+F1.

Also you can use target icon in Project view. With Rubymine 2019, it'a new target icon.

In RubyMine 2019.3:

1. click on the project gear icon
2. select "Always select opened file"

You can use a setting that automatically does that.

In Project View go to settings and activate Autoscroll From Source

It will open current file in the project tree like sublime or atom does.