RORY: I wonder if Grandpa’s still in Akron?
LORELAI: Well for Akron’s sake, I hope he’s moved on to Boise.
Boise is the capital of Idaho, a city with a population of around 240 000. It’s more than two thousand miles from Akron, so not a natural place to “move on to” from there.
David Lynch, previously discussed, grew up in Boise. As he’s Amy Sherman-Palladino’s favourite director, I expect that’s why it rates a mention.