Ah, young love!
"They're very happy together," a source told us. "The only downside is that he's on the road a lot. She doesn't join him because she is focused on school."
And besides her enviable good looks, the 18-year-old model is spending time in New York City where she's attending college at the New School.
"They see each other whenever they can and when they're not together, Gigi's either got her head down in her books or she's on a modeling job," the insider added.
"It's a very healthy relationship."
Sounds like it!