usage of "se"

Question

Is "se" ever used with gustar outside the case of reflexive liking each other?

Answer

Hola R,
no, gustar is only used with "se" in reciprocal sentences:

María y Marcos se gustaban mucho cuando estudiaban juntos en la universidad.
María and Marcos liked each other a lot when they studied together at Uni.

We may sometimes use it in a reflexive way when you say for example you like yourself in a certain way:

Me gusto mucho con el pelo corto.
I like myself a lot with short hair.

Outside that, I can't think of any other situation you'd use se with gustar.
Saludos
Inma