My son also has learning disabilities and struggled with math. He did not take chemistry at all. He was still able to get into a nice supportive college and graduate from it.
Not everyone has to be a STEM person or act like they are. The humanities are what makes life beautiful. If that's his strength, go for it!
+1000 and I am a hard core scientist. I love all the attention that STEM gets but I hate how everyone feels like the need to be placed in a STEM box. If he is planning to follow a humanities course then focus on that GPA. The GPA is oft quoted, the list of couses, not so much.