If you're only on your second solo nav, I'd think twice about this.
At this stage of training the nav shouldn't be so challenging as to need GPS, and if you're still a low hours student you don't want lots of head in time being distracted by a big ipad, those things are actually quite big for a GA cockpit.
Perhaps talk to your instructor and see if you could use it during any lessons, but remember you wouldn't be able to use it for test so don't start getting used to relying on it.