[name]Hi[/name]! I think it’s great that you love [name]Gabrielle[/name]! You should go for it! No need to talk yourself out of using a name you love! You’re lucky you’ve found such a name!
[name]Even[/name] though [name]Gia[/name] is its own name apart from [name]Gabrielle[/name], I don’t see why you couldn’t use it as a nickname for [name]Gabrielle[/name]. I’m personally really liberal when it comes to nicknames, and I think you can call your daughter whatever nickname you love. Yes, she may have to explain to people that her given name is [name]Gabrielle[/name], but that’s not a big deal.
I hope you choose the name that makes you the happiest!