Cant recommend it as a tie-in or a Gotham Academy issue
As a tie-in this takes place after Robin War #1 and starts with a GA student being expelled after he was busted for being a robin while chasing his roommate for stealing money from the school and both witnessing a zombie coming out of the greenhouse.
The issue deals with the Detective Club trying to solve the mystery of the zombie with Riko (from We Are Robin) getting involved just by chance (or plot requirement); the zombie turns out to have a connection to both Olive and the Court of Owls (who Riko gets a glimpse of and later in the event will come in play)
Characters as usual in the GA series are great but it is obvious that Riko doesnt fit here (even herself thinks so) and how the zombie can know/recognize Olive is interesting for the series but at least as far as the start of Gotham Acedemy Second Semester it hasn't paid off;
The part of the plot that works as a Robin War tie-in will indeed become somewhat important near the end of the event but it seems it was made just to have Riko contribute in someway after she was sidelined from the main story to be in this issue
Art in this issue was too cartoony and didnt like it very much althought some character's expressions were funny