>>11647760If grad school means PhD, it's the most important part. Rather, you probably shouldn't even apply for a PhD program if you haven't been involved in a research project.
If you mean a master's, though, I suppose it depends more on the specifics of the school, but generally not as important. Not as essential, for sure.
By the way, doing research (even good research) does not mean publishing papers. It means gaining experience about the process and getting a letter of rec which attests that you understand how grueling it really is.
Also, if you plan on applying to physics programs in the US, don't fuck up your physics GRE. Take it seriously. GPA is easy enough to keep up to snuff, especially your in-major GPA. But a fucked up GRE score can look bad even with good grades.
Oh, and speaking of GREs, I'm pretty sure no one gives a fuck about the general GRE. If you're not retarded you'll score well. Honestly it's such a waste of time and money, I don't understand why so many programs still require it. It's more pointless than the SATs, and imo easier too.