Hi, Gia. I don't know whether you'll find parents with children who have that specific syndrome, but you will find parents who have children with idiopathic focal epilepsy, as your daughter has. And you'll also find many members with seizures that, at the very least, do affect the occipital lobe, so I think you'll find more than enough information here.
I'm not a parent but I do have epilepsy and I believe that the single most protective thing you and your daughter in law can do for your granddaughter's epilepsy is to educate yourselves. Get to know the symptoms of all the different seizures, get a thorough understanding of status epilepticus in every one of those seizure types, so that you can take action when seizures go on for too long. A medic alert bracelet is always a cushion, in case you end up in a situation where you can't remember what medication she's taking and she needs to be treated in an emergency.
As I say, I'm not a parent and other parents will give you more solid information, but take preventative measures. The most important things, off the top of my head, are either supervised bathing or showering (decide if you need to turn the temp of your water heater down), removing access to stoves and anything that could cause burns, and softening up any hard floor surfaces with carpets. Basically, fall-proof your home. Other than that, and any other preventative changes others will advise, and getting to know when seizures become dangerous, I don't believe neurologists like to get excessive about helmets and that sort of thing before there is a very real need.
For me, it has been imperative that I change my home so that it's safe in case of seizures, and then let go and forget about it. I cannot live my life in fear and I think it's important for all of us who have epilepsy, even the youngest, not to develop a fear-based life because of our disease. Epileptologists and some neuros are sometimes highly specialised with dealing with children's cases, and should be able to give you all plenty of advice about safety and day to day living. Don't be scared to ask all the questions you like in the doc's office.