How would I identify if a model has animations?

[Scrimby]

Hello, I was wondering how to identify models that have animations, you see, I wanted to port a random model to gmod. The whole plan was to import a model and get it to play its animations instead of making a big 'ol model and rigging it (the whole process is a nightmare). and I just wanted to know if there is anything to look out for when looking at models animation wise?. I think fbx is the one with animation import abilities?, but i'm not sure. If anyone would like to help me that would be wonderful!, thank you.