GEDs have some of a stigma attached to them, they're not really considered equal to a high school diploma. I wouldn't take it. IN California, there's something called the California High School Proficiency Exam, which *is* considered to be equivilent to a hs diploma, and a lot of homeschoolers I know take that (usually somewhere between 12 and 16, for the record).
Otherwise, I would just put down graduated from hs as a homeschooler, since most of the stereotypes of homeschoolers are that they're smart, if nerdy. Most kids we know who are that age have taken at least a couple classes at a community college, so putting that down would help, too - "6 credits at Bloppity Community College".
The teens we know often gets jobs through networking, which is cool because they tend to be jobs well-suited the the kids. Our friend Victor (18) did apply for and get a job at a toy store, and he put that he had been homeschooled. Our 18 yr old friend Rael got a job in computer stuff and also put homeschooled, but he had a whole resume detailing the stuff he'd done and knew with computers, which mattered a lot more than his high school diploma or lack thereof.
Single mom to Rain (1/93) , grad student, and world traveler