Ask yourself why you didn't succeed in high school and really think about whether you studied too little or if other problems, like bullying or poverty, prevented you from succeeding. Life isn't perfect for everyone all the time; high school is a time of emotional and physical change. A medical or health issue may have prevented you from succeeding in the classroom. Talk to a medical professional or professional counselor for additional support as you assess these issues. If you can't afford a counselor or psychologist appointment, investigate sliding scale clinics and local not-for-profit counseling agencies.
Some high schools and school districts offer graduates with low GPAs an opportunity to upgrade those marks. Research and find out the costs, time and other requirements for improving your grades at your school. If you encountered bullying at school, had transportation issues, or simply do not wish to relive the physical experience of high school, seek out distance education, where you complete courses online via the Internet.
Take more time to make your case for college admission. Universities and colleges admit some older students, even those a low GPA. With adult students, acceptance may be based on an age requirement and the passage of time; institutions also base admission on some work experience or evidence of ability to succeed in postsecondary school. Working and gaining real-world life experience and applying to colleges after a period of time is one path to success. However, do not get caught in a low-paying job forever, and follow through on any commitment to go back to school.
In the United Kingdom and some parts of Europe more so than in North America, students complete a "gap" year, during which they volunteer and travel in another part of the world. Gaining maturity, self-confidence and developing work skills, these students return home with newfound interests and passion. All of these acquired skills and experiences are helpful when returning to the classroom. Work with a service organization to complete a "gap" year abroad and go back to school upon your return with newfound wisdom.
Consult your high school guidance counselor, if possible, after learning about your low GPA. Ideally, do this before leaving school, as some schools will not permit former students to use counseling services. Have a professional assess your learning style and determine whether alternative education, such apprenticeship in a skilled trade, is a better course for your learning style and needs.