If I already completed AP Spanish, would it be looked as “cheating” to colleges if I go to my local community college and dual enroll elementary Spanish 1-2 to raise my high school GPA?
Yes, if you want to raise your GPA then take whatever the class after AP Spanish would be and do well in that class.
I don’t think that its cheating- most colleges would see that as you taking initiative to further your learning and deepen your understanding of the subject, which is very impressive. Colleges want students who will pursue their academic goals and be active in seeking out opportunities.