Not quite to that point myself, but I suspect there are cases where a grandparent would not be willing to give money to the parent directly, which is how it appears it should be done rather than grandparents contribute directly to parents 529. For us, we are appreciative of the ABLE account aspect of 529, and our main focus is figuring out how to max that out before our time is done.
Can the plan be transferred from the grandparent to the parent?
In our case, child attended community college, pay as you go, then transferred. We borrowed what we could, but only had to pay 2 years worth. Might have worked for a grandparent 529, if the ability to pay out during those last year or two would not be a negative sum process. Of course, he is now looking at med school, if it is cost effective compared to his current career path.
FAFSA planning is good practice for medicaid and SS planning (I suppose)... and for many, needs to be a service bought.
What I found online:
Change account owner. If the 529 plan allows, the grandparent can change the account owner to the parent. This will minimize the reduction in financial aid the next time you file a FAFSA. Check to see if your state will recapture state income tax benefits if you change the account owner.
Rollover 529 plan funds. Grandparents can roll over a year's worth of funds to a parent-owned 529 plan. If the rollover occurs after the FAFSA is filed, the funds won't be reported as an asset on the FAFSA (assuming the funds are spent before the next FAFSA is filed). Distributions will not affect aid eligibility because the 529 plan is owned by the parent. It’s important to note, the parent-owned 529 plan should be opened in the same state as the grandparent-owned 529 plan to avoid recapture rules when funds are rolled over to a different state’s 529 plan.
Take a distribution later. If the student will graduate in four years, grandparents can wait until January 1 of the student's second semester of their sophomore year in college to take a distribution, after the student has completed his/her last FAFSA. This is because the FAFSA uses the prior-prior year’s income and tax information to calculate eligibility. If the student will graduate in five years, families should wait until January 1 of the student’s junior year to take a distribution.