Applied online (found the program through a list of rotational programs online). A few days later I had an online test (math, reasoning, and culture, etc.).
After you pass that test, you set up a phone interview (30 mins, behavioral questions about your resume, leadership, etc. and the classic question of if you had X amount of coats how would you figure out how to distribute them to stores). You will find out at the end of that call if you make it to the next round.
You then make a presentation on a hypothetical new brand for the company, do financial statements, marketing docs, etc. 15 slide deck that will have lots of follow up questions on how you came to these conclusions, etc. (1 week to do the project, they say spend 10ish hours, but I doubled that easily). Find out a week or 2 later if you make the next round.
Fly out to SF for a weekend with 30 other people. A group interview case study with three others that are observed by four people. Also 2 45 min interviews with behavioral questions and your presentation. I was not asked any questions about the retail industry or Gap Inc brands financials and performance. Very hard behavioral questions and questions that make you question how good your project is. Everyone else at the interview is extremely qualified (Ivy League and incredibly well dressed, do not wear suits. Most people wore business casual, but some wore jeans.)
Find out 1-2 weeks later if you are hired.