Who can help me with this wedding etiquette question?

Tomorrow I’m flying to Texas for a friend’s wedding, which will be taking place on Saturday. She is picking me up from the airport and I’m bringing the gift in my carry-on bag. This is my first time attending a wedding so I’m not sure what the “rules” are and, as such, I want to avoid making any major faux pas. My question is, what is the ideal time to give her the gift, at the airport when I see her or should I wait until the groom is present?

Thank you!! :)