BG has some serious issues which are in violation of the American with Disabilities Act (ADA) both the 1990 and 2010 versions. Per the ADA all amenities must be accessible to all persons. It is irrelevant that the park was built prior to both versions. Many court cases have been lost using the argument that it was in compliance when it was built. BG has made changes and upgrades throughout the years nullifying that argument. All it takes is the right lawyer with the right handicapped person to bring a lawsuit.
They currently do not have an ADA accessible pathway from the parking lots to the front gate. The hills exceed the 5% longitudinal slope and the area they have designated as the handicap path has a cross-slope greater than 2%.
Wolf valley exceeds the longitudinal slope of 5% making the eagles and wolves inaccessible per the ADA regulations.
Grimms Landing has no ramps or elevator making the boats inaccessible per the ADA regulations.
Many of the queues do not meet the width requirements and railing placements. This is more prevalent on the older rides.
Contrasting colors and visibility measures are weak at all stairs and rail crossings. This is a requirement for those with visibility impairments.
Many pathways throughout the park do not meet the longitudinal slope of 5%. This is noticeable around Highland Stables and down into Ireland.
There are also other items that may be in violation: bathroom counters set too high, faucets out of reach, hand dryers/paper towels out of reach, food service counter too high. All of those would need to be measured, however to my eye some appear to be at the incorrect height for someone in a wheelchair.
The department of Justice has great resources online:
Law, Regulations & Standards