Type 1 diabetics and bodybuilding/gaining weight

Hey everyone, I'm a 20 yo male who recently got diagnosed with Type 1. My sugars are now under control and I have regained all the weight I lost prior to diagnoses. I have always wanted to gain weight and just as I was starting to hit the gym and eat more I got a sudden diagnosis which really discouraged me. I have been hitting the gym for a couple months and trying to eat more but haven't gained any weight above my normal weight. Any type 1's out there who can provide any help on what to eat that won't raise my blood sugar but allow me to reach my calorie goals? plus any other tips and tricks to gain weight any help will be greatly appreciated because I have been trying to work towards this goal really hard. Ty