You can find a list of basic physics equations through the following url:
It probably isn't exactly what you are looking for but the pdf file referenced through the link above is a pretty good start.
I imagine that every student that takes the exam has some form of an equation list to study from. It would sure be nice to find a way to collectively create a master list of physics gre equations and publish it for everybody. Maybe the list would be broken into separate classifications of formulas like "absolutely essential", "essential", "good to know", "can't hurt to know", and "probably not important". Let me know if you have any ideas. Anyway, I imagine that the pdf file referenced above probably covers most of the "absolutely essential" and "essential" type equations.