that is not true at all at least not when Musa Veluntina is the banana in question
This study claims other wise
and if you would like me to dig them up again i read three other studies claiming gibberellic acid helped germination of musa veluntina as well... I have not found a single study suggesting gibberellic acid inhibits germination Of Musa Veluntina and if you please provide me a link to one that would be useful as i would like to see what the conditions were besides the application of Ga3