As you are a librarian you should know librarians can't merge claimed/verified profiles as stated in the librarian manual, not even superlibrarians can do that. Librarian Manual: How to merge two author profiles ---> https://help.goodreads.com/s/article/...
In this case both pages should remain. People searching for Gabriella Santos de Lima should be able to find the books, and people searching for G.S. Lima should be able to find the books. The author has written books using both names. One could argue G.S. Lima is contained within Gabriella Santos de Lima (the system seems to think so anyway) but the author has chosen G.S. Lima as her verified account, nothing we can do about that.
In this case both pages should remain. People searching for Gabriella Santos de Lima should be able to find the books, and people searching for G.S. Lima should be able to find the books. The author has written books using both names. One could argue G.S. Lima is contained within Gabriella Santos de Lima (the system seems to think so anyway) but the author has chosen G.S. Lima as her verified account, nothing we can do about that.