If you take a super pastel all the off spring will all be pastels.
If you take an exibiting G stripe all the off spring will be Het for g strip (they carry the genes for G stripe)
If you take a Super pastel to an exibiting G strip then all of the offspring will be pastel Het for G stripe.
Grow out the babies and put the babies together. You will have a 1 in 4 chance of getting a super pastel and you have a 1 in 4 chance of getting a G Stripe. I may be wrong but I believe you have a 1 in 16 chance of a super pastel G stripe. All the offspring of a Het to Het, There is a 66% chanch they will be het for G Stripe. Remember tho that genitics are a crap shoot and because you should get 1 in 4 or 1 in 16 it doesnt always happen