I personally do name schools in my PS. I believe this is ok based on past research on personal statements (I've read many from top schools!). I think it's more of a personal decision rather than a concern of permissibility.
After undergrad I was heading to a grad program to do research. So my senior year was not at all GPA focused. Even my advisor would say: "no one cares about grades, just get the publications." Lo and behold...
I would do some research on how this particular school treats gpa vs lsat. Some schools put more value on your gpa and not lsat. Try "top law schools" blog. I always find it to be a good source.