It is used to indicate that Jorge and the speaker are both doing something or are the subject of a sentence.
For example:
* Jorge y yo vamos al cine. (Jorge and I are going to the cinema.)
* Jorge y yo somos amigos. (Jorge and I are friends.)
It's important to use the correct pronoun "yo" (I) after "y" (and) because it emphasizes that both Jorge and the speaker are involved in the action.