We offer several light-duty Class I hitches for your 2007 Volkswagen GTI 4-Door and I recommend the Draw-Tite # 24825 since it offers the very same capacity as the others but costs a bit less. To help your installation I have linked for you the written instructions, an install video and a helpful article.
With a Class I hitch you'll use a matching Class I platform-style bike rack. All Class I platform racks are shown on the linked page. The Thule T2 Classic # TH9045 and the Kuat Transfer... view full answer...