Grad N Go is ONLY Sailors who are going to "A" School in Great Lakes, and they move to the "A" School base on Friday. Sailors going out of state to another base will leave no earlyer than the morning after PIR.
Only the Recruit will know when they leave for their "A" School, which they find out towards the end of bootcamp.
Grad and Go is a mixed term. RDCs tell all recruits who will be leaving for A school over the weekend that they are GnG, so we've developed a different use of the terms: GnG Great Lakes - for those staying in Great Lakes and GnG Saturday Ship for those who will fly out on Saturday. Either way, they don't stay at RTC for PIR weekend.
There has also been some confusion about those who are flying out. Official Navy policy is that no sailor will fly out on Friday, but some parents have reported that their sailors are scheduled to do so, or have done so. Someone needs to straighten this out.