GPM meaning in Real Estate ?

A graduated payment mortgage loan, often referred to as GPM, is a mortgage with low initial monthly payments which gradually increase over a specified time frame. These plans are mostly geared towards young people who cannot afford large payments now, but can realistically expect to raise their incomes in the future. For instance a medical student who is just about to finish medical school might not have the financial capability to pay for a mortgage loan, but once he graduates, it is more than probable that he will be earning a high income. It is a form of negative amortization loan.