+++++++++++++
In our case my daughters name was on the GAC but because I also am a wheelchair user and we needed the GAC for wheelchair access on some rides, we were actually instructed to use the card for me even though it was in her name. This was because they only allowed one GAC per family. The new
DAS requires a separate one for each family member with a disability.
That was one issue with GACs.
There never was a requirement for GAC for wheelchair access, but many people, including guests and some CMs thought there was. Requiring some 'proof' like a GAC to use the wheelchair accessible entrance with a wheelchair would be against the law (ADA).
So, how did that happen?
1) There WAS a GAC stamp to use the wheelchair accessible entrance that was meant for guests with mobility needs who did NOT have a wheelchair. That stamp was also sometimes given out when guests did not plan to use their wheelchair in line.
CMs at Guest Relations also sometimes gave it out to guests with wheelchairs who insisted they needed a GAC (this is what I have been told by CMs). It actually did nothing that the person could not do with just their wheelchair.
2) When MK and Epcot opened, most lines were not wheelchair accessible and guests with wheelchairs used a different entrance, often the exit.
In the late 1980s thru 1990s, WDW started renovated lines to create Mainstream Access, which was required by the ADA. Mainstream Access means attractions are accessible thru the main line, as much as possible, the same way other guests access the attraction. The Studio and AK were built with Mainstream access, so have not changed any of their lines.
Guests who had visited previously came back to use what had been the 'handicapped entrance' and were told they could not use it with just a wheelchair and needed a GAC. It had often become the "alternate entrance" used by guests with other types of needs or other types of needs in addition to mobility needs.
Many people did not realize the regular line was now accessible and thought their only way in was to get a GAC.
3) Fastpass came into use. Sometimes, guests with wheelchairs were sent thru the Fastpass line because there was a short wait in the regular line and sending them to it slowed down the regular line. Sometimes it was pixie dust. In most cases, no explanation was given, so the guest thought it was the handicapped entrance. When they came back to the Fastpass entrance to ride again, they were told they needed a GAC to use that entrance.
That was the "alternate entry" and a GAC was needed for guests with other needs or who had other needs beside the mobility device.
4) some guests with wheelchairs has other needs and did need a GAC with an alternate entry stamp or they were traveling with someone else who had a GAC for that entrance.
Confusing?
It was very confusing to both guests and CMs. Some CMs thought anyone using a wheelchair also needed a GAC - and would send guests back to Guest Relations to get one.
My family was told a number of times that we needed to have a GAC to bring our daughter's wheelchair in line or bypass stairs. Several times, we had Fastpasses and were told we needed a GAC to use the Fastpass line!
Once, we waited in the regular line at Splash Mountain, but the CM at the wheelchair gate just before getting to the stairs told us she could not let us through because "that would be cutting".
In all cases, when we asked for a Supervisor, the CM was told it was against the law to require a guest with a mobility device to have a GAC just to use the accessible line.
I know that a lot of people didn't ask for a supervisor, but just went back to Guest Relations to try to get a GAC.
_____________
The concept of where to draw the line on "family" for the DAS is a tough one! We were in line behind a "family" of 18 at DLR. There were 6 or 8 adults in the group. One wheelchair. But clearly another child could have also been disabled so no Im not judging, but it brings up the question of where should the line be? They are good about accommodating larger groups on the DAS, but I think in these cases they need to try and link the DAS with the FP. When we meet friends we do not add them to our "family" we try to coordinate their FP time. Problem is the FP are now gone 6 mo in advance so even thats a poor option. Not sure what the right answer is these days other than just go, be honest, and enjoy the trip and not worry what others are doing.
Just so you are aware - for most attractions, not all of the Fastpasses are released at the same time. Some are held for same day release and some become available closer to the time of the trip.
So, if you have things you want, keep looking, even to the day you are going you the park.