Parents, students, and Jack Carr, a GAMP founder and its principal, fear that eliminating busing would create a dangerous situation for students. Many, they say, would have to leave GAMP.
"Imagine a 9-year-old child on a SEPTA bus carrying a $20,000 bassoon," said Carr. "That's a real safety problem."
Some parents have already indicated that because they can't drive their children to school every day and don't feel comfortable with middle schoolers taking long SEPTA rides, they will have to pull their children out of GAMP, Carr said.
"It would eliminate GAMP as an option for some families," he said. "We would lose some of our diversity."
The 500-student school, which educates fifth through 12th graders, is about 50 percent white, 28 percent African American, 15 percent Asian, and 4 percent Latino.
The district's financial problems are severe, organizers acknowledged. (The School Reform Commission this week floated $300 million in bonds just to keep schools open for the rest of the year, and there is more pain ahead.)
But parents said cutting yellow buses for 173 middle schoolers is not the way to make ends meet.
Every day, fifth grader Micah Way gets on the yellow bus with his heavy book bag and his trumpet. He takes a long ride from Northern Liberties to GAMP.
If he had to take SEPTA, that would be at least a three-bus ride, said Gwen DeVeaux-Way, his grandmother.
"It would be terrible," DeVeaux-Way said. "He's a short little guy."
Getting Micah, who plays piano and trumpet, into the school was tough - it has far more applications than available spots, thanks to the strong academics and extracurriculars it has managed to maintain despite budget cuts.
His mother starts work before Micah is due at school, but if school buses are eliminated, "we would get him there some way," DeVeaux-Way said.
But not every family has that option, she noted.
GAMP had retained its yellow buses because of a decades-long court battle over desegregating Philadelphia schools, but that case was settled in 2009. Some desegregation routes stayed, but others have been eliminated.
District officials have said they could save as much as $1 million by ending all desegregation busing.
The GAMP community took its case to a School Reform Commission meeting last month, and vowed Thursday night to keep up the campaign until officials find a way to pay for their school buses.
Contact Kristen Graham at 215-854-5146, firstname.lastname@example.org or on Twitter @newskag. Read her blog, "Philly School Files," at www.philly.com/schoolfiles.