I have this same question. I have several 3DS and several GATEWAY cards, each has A9LH installed and the latest firmware. My newest console, a N3DSXL, has never had Gateway and has no emuNAND. Do I need to create an EmuNand for Gateway or can Gateway run on A9LH sysNand? Is there a disadvantage to running it on sysNand? Since I am on the latest firmware with A9LH, how do I set up Gateway sysNAND or emuNAND?