Hi Mrs Ang,
Oh you have distributed your invites! That's great! My parents insist to be given out on GDL date only. I have checked with them if I can give my friends first, and they're ok. But they're quite strict on giving out to relatives on GDL.
She mentioned to me, during her time, GDL is less than 5 days before their wedding. Haha. Luckily, mine is 3 weeks before.