Any student would be far more likely to graduate in 4 years at UPenn than at GT (or any public university). These are two very different schools. Review the (very different) electrical engineering curriculum, and it’s clear why it’s easier to graduate in 4 years at UPenn vs GT.
http://www.ese.upenn.edu/current-students/undergraduates/ee-sample-2017.php
GT’s program requires 132 credits (vs the standard 120 for a bachelor degree). GT designs the program to be completed in “4” years by cramming up to 6 classes into a semester. You can also see the complicated system of prerequisites, co-requisites and even prerequisite with concurrency (got to love those). It’s a challenge graduating in 4 years, and that’s before considering any minors or certificates (or design teams, clubs and other demands on the students time).
UPenn expect’s only 4 or 5 classes a semester. They also expect each student will graduate with their class. They have far smaller classes, and much better advising/tutoring.
Can you graduate in 4 years from Tech? Sure! However, you should plan on the possibility of taking at least 1 additional semester to graduate.