we dont actually know where linda and gayle grew up we just know that it was NOT seymour's bay and that its likely an hour or two drive away from where they currently live (I like to think that gayle moved to seymour's bay after linda did because she wanted to be like her big sister lmao)

their hometown is specifically called Hunkawtaway which is apparently a play on native american appropriated town names in the midwest so I think she most likely didn't grow up in new jersery but still somewhere in that general area of america (like connecticut or massachusetts)

for bob I would say he grew up in the area surrounding seymour's bay but not actually IN seymour's bay because its a small-ish town and we don't ever see big bob's diner around. I would say they live maybe a 30 to 45 minute drive away from big bob (who still lives where bob grew up) so still definitely in new jersery but maybe somewhere closer to the bog habour area??

we know they both didn't grow up in seymour's bay as they never went to wagstaff or huxley high school (but it seems like at one point they were maybe considering that bob and linda went to the same high school, because the original subplot for linda's high school reunion episode was going to be someone from BOBS high school who had a crush on him was trying to flirt with him at their reunion. this got changed when they realized that bob and linda obviously didnt go to the same high school growing up) but I think bob definitely lived closer to their current location that linda did. they most likely moved to seymour's bay when they saw a resturant location in the area renting for very cheap and previously lived closer to bog harbour

(and we know that teddy has a long family history specifically in seymour's bay)