As much as I would agree with the matter of choice, the OP apparently hasn't bought the Gateway yet. It's best now to heavily discourage them from doing so and encourage them to go with a cfw.
So everyone seems to just be giving you soundbites of information and that's not fun
The Gateway team more or less stopped supporting their cart several months back and are part of the "Stargate Team" now. What this means for the Gateway3ds future is up for debate, but doesn't change the fact that the cart is now rather out of date.
Although there is currently no method of playing .3DS ROMs on free CFWs, you can however install CIAs from any region. You can both install them through FBI or download them directly from Nintendo's severs via freeShop and or CIAngel.
Since you are on 11.2, you are currently running an exploitable OFW. This means following the mentioned 3ds.guide will get you on the road to installing Boot9Strap (B9S) and a free CFW! This will also mean when you are done, you can update to 11.5 without any issues related to updating and no need an emuNAND.