Yes, you can give those to your glider.
EDIBLE seeds are just that - EDIBLE to both humans and gliders. Gliders can safely have the tiny seeds that are present on strawberries and other berries.
You must avoid seeds that you, yourself, would not eat.
Many people actually feed diets that INCLUDE sprouted SEEDS. So, it is really an injustice that there is so much negative information out there about the feeding of seeds in general.
Feed the berries. Your gliders will love you for it.