Seems like a Type 1 to me, or maybe LADA as your C-Peptide is in normal range yet, but with high BG. I bet C-Peptide can go on lower side as long as blood sugar is normal (happened to me while in honeymoon period). Probably you will get a honeymoon period when your blood glucose will be close to normal while requring less insulin or not insulin at all. Also GAD antibodies aren't the only T1 or LADA specific antibodies as myself I had no GAD