Carbohydrate is the high grade fuel for your muscles. Unfortunately your body can only store a limited amount of carbohydrate even High5 the company which produces your gell at choice makes no reccomendation at for the consumption of gels in non compeditive rides of 40-60 miles and they even state "
BUT TAKE CARE! Research suggests that if you consume more than 60g per hour of the carbohydrates found in traditional* sport drinks, it will not be absorbed."
Sorry to say but unless you have an appealing diet I am of the same opinion as
@RussellZero and you would have been fine. It sounds to me as if you have a comfort blanket in the gels. It is OK to suffer and part of cycling, we all have hard days. Have you discovered what happens if you do not take a gel?