And now, the anonymous high school tweeter who has been teaching her fellow students a thing or two about kindness. All the years, she has been a big mystery, until now. And gio is back and has that... See More
And now, the anonymous high school tweeter who has been teaching her fellow students a thing or two about kindness. All the years, she has been a big mystery, until now. And gio is back and has that story for us in social square. Reporter: I just love everything about this story. Take a look at her profile right now. If you look closely, you can see that backdrop. All you need is love, right there. Get ready, America. You're about to meet the girl behind this positive message. This skull and bones stuff is a bit much, don't you think? Maybe. But it works. Every time. Reporter: In the show "Gossip girl," high school teens celebrate people's worst moments, with cruel and hartful gossip. But in real life, there's an anti-gossip girl. A Kentucky student with a heart of goal. Using a Twitter account to celebrate the best of people. The mystery account created in January, with this. My mission, it's simple. To spread positively around Boyle county high school. First compliment goes to -- she's a sweetheart. Your smile and positive outlook doesn't go unnoticed. After hundreds of nice messages, the whole school wondered, who is behind this? On graduation day, they found out. This young lady is a great leader, a great student, and even better person, who has billed herself as the infamous bchs anonymous, tweeting about various students throughout the school year. It's miss Taylor Stewart. It's crazy to think how one positive thing can pull someone back from the edge. Reporter: Now, off to college, Taylor is passing the torch to another anonymous tweeter. I think if we use our words in the right way, there's no telling what we could accomplish. Reporter: Absolutely. Class of 2014, you did it. Go do good. And she also wrote this -- thank you, guys so much for all of the encouragement and support these past few days. Still showing lots of grace. Robin? Thank you. Pay the positivity forward. Tweet us your favorite positive message at "Gma" #socialsquare. Gio's on it. Reporter: This is for you, robin. Go do good, people. Great to see those all come in. And another guinness book world record about to fall,
This transcript has been automatically generated and may not be 100% accurate.