I'm sure you're good on top 15%, and congrats...and mellow a bit, you don't want to die of a heart attack at 35.
That said...Suppose, in reliance of GULC's promise, you didn't work quite as hard as you could have (let's say you took a 20 hour internship and it caused you to get straight b-). If they revoked, do you think you could win breach of contract damages, arguing that you effectively had a contract, and that your starting salary would have been higher (assuming not overly speculative?) In the alternative, could argue that, by reasonably relying on the transfer (and that the grades wouldn't count), even if you didn't have a contract, GULC's revocation effectively destroyed the value of the courses you took (given that they impact whether you are employable), and you could go after reliance damages under a promissory estoppel claim and try to get your tuition back for last semester?
Just crazy thoughts...