Since I've seen so many threads about people having trouble using Gateway alongside A9LH, I thought that I'd finally pop my guide cherry to provide the information in a centralized location. This guide assumes that you've already followed Plailect's OTP guide up to at least Part 5, Section III.
Until Gateway comes out with their A9LH payload, there are pretty much two ways to boot into Gateway Mode while using Luma3DS+A9LH. They both...
[GUIDE] How to use GW+Luma3DS+A9LH
Until Gateway comes out with their A9LH payload, there are pretty much two ways to boot into Gateway Mode while using Luma3DS+A9LH. They both...
[GUIDE] How to use GW+Luma3DS+A9LH