Integrating a ruby program w/ GUI in a Rails application

This is somewhat hard for me to explain properly, sorry in advance if the question is unclear! I am fairly new to both Ruby and the Rails framework but I'm working on a Rails application in which I want to be able to run a self-made program with GUI.

The question is whether or not it is possible to just "have" the program running like it otherwise would, but in a page in the Rails application, and if so, how?

Thanks in advance!