Hi Patas,
Let first say I have not followed the SCD diet but I have been following the paleo for a little while and now I am just kinda following my own thing which is a lot of moderation on gluten, dairy, processed food, etc. I went too look for a few things in the scd allowed list as I am not perfectly at ease with the lines of this diet.
I think I might have a few suggestion for you but it also depends on when you got your surgery? I assume it is fairly recent has you have been diagnosed 6 months ago, how long has it been for the ileostomy?
At first, the output will is likely to be quite watery, things get better over time though. Thankfully! Food that helps me thickening it often consist of starchy food which can make the whole deal tricky as these aren't "allowed". Going through the list of safe food that helps me: strawberry, squash (puree), apple (puree), peanut butter, egg, meat and cheese. I don't know has of yet if you are ok with these things.
When it comes to gatorade, I would encourage you towards a "homemade" version which could probably fit in the SCD lines: normally I simply get half orange juice(500ml), half water(500ml) and a pinch of salt(half a tsp). I believe you could also do something without the orange juice getting water, salt and honey. Coconut water is pretty amazing on it's own to help keeping the balance too!
Anyway, I hope this helps a bit =)