I have the same issue in that I have a mobility disability that isn't addressed by a wheelchair alone. I find it really hard to believe that were I to ask for a GAC, Disney would refuse to help me and I would have to suffer. Go to guest services and explain the issue. The gac is issued based on needs, and your needs mean a mobility aid alone wont solve the problem.
While a mobility aid may not solve the problem alone, a mobility aid used in conjunction with periods of standing and sitting, as well as taking breaks to lie down, whether in first aid or the hotel, would cover most aspects of the issue.
I am not sure what the GAC would be able to help with in this situation (I have nerve problems at the same level, so I understand the daily pain that gets worse with standing in one place for too long). Most walking that takes places would take place between the attractions.
Once at attractions, there are three main groups, shows, batch loaders, and continuous loaders (with some overlap of course). There is no GAC that would help a person not have to stand to wait for the next show, Philharmagic for example. The person with the GAC would have to wait for the next show no matter what was stamped on the card.
Batch loaders are rides like Haunted Mansion (which eventually turns into a continuous, I know), Soarin, Small World, Pirates, Ellen's Energy Adventure, Great Movie Ride, and many others. In these cases, a person is in a queue that is in one place for a period of time, then moved forward quite a bit at once, and then stops in one place until it is time for the next batch to go in. These times between batches can be 2 minutes or 15 minutes, with little way to guess ahead of time.
Continuous loaders cause the fewest problems with standing - people get on a ride continuously, like Buzz Lightyear or Nemo in Epcot, and the line gradually moves forward.
Obviously it would be the standing in one place for shows and batch loaders (which is the majority of the attractions at WDW) that would cause difficulties. Sitting sometimes, standing, walking when possible, and moving around in place would give multiple positions and multiple options to avoid standing in one position for a long period of time.
What could a GAC do that would change the above situation, with batch loaders and shows? It could not change the number of minutes spent waiting, as people are only taken in at certain times for things like shows. Occasionally a GAC will change the distance walked, but distance is not the problem here, standing in one place is the problem.
Disney does not want you to suffer, and if there is a GAC that can help, then they will provide one for you. But many people had started asking for a GAC simply because they did not "want" to have a wheelchair or
scooter, even when one was offered to them free of charge.
I spend a lot of time in City Hall (it takes a while to print the sign language interpretation schedule at least once a week, plus I am in there every two weeks to renew my GAC), and many people come in saying they have back problems or knee problems, and that they cannot stand in the lines. This is when Disney suggests their best option to avoid standing is to rent a wheelchair or scooter, especially since the most walking is done between attractions. Then the person explains that they can walk just fine, they just cannot stand in one place. Again, the CM suggests that having a wc/
ECV would allow them the option of sitting sometimes. I will not speculate on what percentage of people get a GAC or what the stamp is - I cannot see it and any numbers would just be guesswork on my part.
I am simply stating that this situation is one common for Guest Relations to hear. And at least in DL (CA), they have been very good about stressing that mobility and stamina concerns can often be met through using a wheelchair or ECV. Of course there are always situations that are not met through a seated mobility device (as opposed to crutches, canes, and other types of mobility devices).
I am not sure what a GAC can do to make standing times shorter - even Make A Wish kids need to wait for the next show to start.
The answer none of the people I have asked (not on this board, elsewhere) is why they refuse to use a wheelchair or ECV at all, even as part of a larger strategy which includes walking, standing, lying down, stretches and ice packs/heating pads (either in First Aid or the hotel), and whatever else a person does in the rest of their life to alleviate the pain the L5-S1 problem causes.
I know a wheelchair is not going to fix everything (I use one full time - I am aware of its limitations), but I really do not understand why people refuse to consider it out of hand. I have even heard people ask Guest Services to give them a GAC which allows them to sit while in line (or while their party is in line), but utterly refuse to consider a wheelchair, even when one is offered for free.
And what is a wheelchair but a place to sit in the lines?
I know it is not a cure-all, but neither is a GAC, and I am not sure what people want a GAC to provide in this case.