Does GD always mean early delivery date?

😺Jae • 36 in July2015. FTM. Super happily married.
Has anybody delivered on or after the expected due date? All the articles I've read of women diagnosed with gestational diabetes delivered at least  2 weeks before EDD
I really need baby to stay put until close to delivery date. Is there anything I can do to make this happen? She's already very active at almost 21 weeks. Due date 1/6/2016.