senior in hs need help

Im a senior in High School with a 1.88 weighted gpa and 22 on the ACT. Many factors contributed to my high school grades. Anyhow, i was on my schools college acceptance page and saw a few kids that have gotten into some pretty reputable private institutions with a 1.7, 1.8 ish GPAs. I was just wondering if its possible to take summer courses at a community college and possibly stay for one semester and then transfer to a 4 year university?

See the middle of this page:

https://www.petersons.com/college-search/ask-experts-transfer-colleges.aspx