Did illaoi and gp got to consumate their relationship ?

They almost certainly would. They were described as "lovers"

And if I recall Illaoi was GP's first.

And I'm sure she broke him in.

used to like the bad boys

But now she's looking for a real man who won't break

If she was wearing her original Battlecast clothes in one of the times then Gankplank was lucky

You think Illaoi would't smash?

The kind of cute, naive questions asked by young preteens.....

Illaoi had sex before marriage? B E G O N E T H O T

I'm guessing they'd have their fun and all, it certainly didn't seem like a toxic relationship nor a really hard breakup. Illaoi has even admitted to still having feelings for Gangplank.

Speaking of which, as an Illaoi player myself, I think that (considering how old Gangplank looks) Illaoi's either in her late 30's or very early 40's.