If your vial was 10iu of GH and you put 100iu (1ml of BAC water) into it then pull to the 20 on the slin pin and that's 2iu of GH.
Or, said differently, your vial has 10iu of GH in it so you want 1/5th of your total BAC water (ie: 2iu which is 1/5th of 10), therefore however much BAC water you put in draw 1/5th of that amount and that's 2iu. In the event you put in 1ml (100iu) of BAC water then you draw to 20iu which is 1/5th of 100iu. If you put in 2ml (200iu) of BAC water then draw to 40iu, and so on.
So, no, what you dosed was a negligible amount of GH and not the correct dose. Repin yourself with 1/5th of the amount of BAC water you put in assuming your vials are 10iu of GH each.