It may have been a sex joke at first, but "gimp" as a derisory term for people with difficulties walking was first recorded by the OED in 1925. The development team know that perfectly well, and their decision to keep on using the slur was reported in El Reg fairly recently.
And, of course, if they want their software to be more widely used in professional circles (and there is no reason why they should want that, of course) giving it a sex-joke name really isn't any better than giving it an anti-disabled name.
Biting the hand that feeds IT
