Code for Open Economy Model needed

Hi everybody,
Currently I have a task to reproduce the paper of Gertler, Gilchrist Natalucci (2007) from BGG and compare it with Schmitt-Grohé & Uribe. I have reproduced BGG itself but can not do anything further for Gertler, Gilchrist Natalucci (2007). I am an undergraduate student with modest experience in Dynare. I will be happy if someone can help me with the code for it.
Thank you in advance.