Your first sentence is not passive. That is "pronominal", usually confused with "reflexive". The verb "gustar" requires the person "who likes" to be in accusative case. Thuse:
Me gusta
Te gusta
Le gusta
Nos gusta
Les gusta
Les gusta
Your second sentence could be passive, but it is not correctly expressed. Though grammatically correct, it is unnatural to use the verb "gustar" in passive voice.