I believe that Al enrolled there as an "early out" from Vietnam. Once safely stateside, he abandoned his "studies".
According to wiki (of all places) it says he was kept away from combat on purpose. That there was fear that if he got wounded or 'worse' it would help his father get reelected to the senate. But daddy Gore lost the race by a good margin anyway so it's doubtful any sympathy votes would have helped him.
Again, this is in wiki of all places. Surprised they haven't scrubbed those parts.