Its funny how all the answers are pretty much "i think ..." except the one from the resident and its completely opposite from what everyone thought.
If you ever want to know something Ask the people in charge of it for example, if you want to know about medical school as a Med school Adcom, if you want to know about residency as one of their Adcoms and even then ask a couple different programs to get a feel for what the majority think.
How often are you asked for your high school GPA now?
My experience may be uncommon.
Or it may be that I applied to a competitive field.
Much as your life before college doesn't count for med school apps, your life before med school won't count for residency and so on. You may thing what you are doing now has lifelong impact, but in fact it's just something to let you vault to the next level.