You may have to consider the schools
request for all transcripts of every school you ever attended. If you leave out a school, you could be considered falsifying your application, which could very well lead to expulsion from your program, even after you have been admitted.
I was tempted to leave off my application the fact that I had attended and withdrew from a nursing school
. But I decided to be honest and disclose that fact. I included another letter in my application that explained the circumstances in which I left, that it was due to financial hardship and not lack of skill or interest. I got accepted.
You should probably at minimum include a letter explaining the circumstances of your schooling back in 1990, that you were young and undecided and now you are wise and hardworking, ect. You could point out your current GPA.
It also depends on the admission protocol for your school. If it is a lottery system, then it really doesn't matter how high your GPA is over the minimum; you have the same chance as anyone else. If it is a weighted system using points, then you should emphasize your recent success and work history, volunteering, ect