It said it does not intend to demolish any houses to make room for the multi-million-pounds stadium.
Senior official Stephen McGeehan said the GAA is willing to consider a capacity below 38,000, the number of seats in the original redesign plan.
A new community consultation about the proposal was announced on Tuesday.
"The GAA has no intention, and never had, of knocking people's houses down, of purchasing or demolishing anyone's homes," said Mr McGeehan, who is the Casement Park project manager.
Planning permission for the stadium's redevelopment was overturned in 2014 and since then the GAA has been working on a new planning application.
The GAA said it wants to hear feedback from people in west Belfast and further afield about the proposed new stadium and has organised a number of consultation initiatives.
The GAA has laid out a proposed timetable for the stadium:
The GAA said the redesigned stadium will take into account the fears over the emergency exiting arrangements in the original design.
The Gaelic Athletic Association (GAA) has said it hopes to start building a new Casement Park stadium next year and play matches at the ground by 2019.