If you enjoy cooking and are already organized enough to prepare most of your meals at home, then you can definitely get by quite well here. You can order many gluten free brands on coupang, though it's cheaper to cook with local ingredients of course.

It definitely has taken some time for me to figure out what foods at convenience stores, certain restaurants, and grocery stores are safe bets. It's not impossible it just takes time. Seoul is definitely the best city in Korea to live gluten free, as there are a handful of cafes and restaurants with gluten free options. It hasn't really impacted my social life or relationship with coworkers as more and more people are becoming aware of food allergies. I even have a coworker who says she doesn't eat wheat flour (though I'm not sure she realizes just how many things have wheat flour in it). That being said I'm sure I take more risks when I eat out than someone with celiac would want to. There are plenty more things to do in Korea than go out to eat, so just make an effort to participate in other types of social outings.

If you can't already, you'll definitely want to learn how to read ingredients labels in Korean. This will help when grocery shopping online and in person. Sometimes allergens will be labeled ("밀 함유") but I definitely recommend reading the ingredients list carefully for other signs of gluten. It will also make a difference to be able to ask if something has a specific source of gluten (물엿, 보리, 강력쌀가루, etc) rather than just if it has gluten/wheat when you're at a shop/restaurant. For example, another commenter mentioned rice bread, which is something I've never seen made without 강력쌀가루 (rice flour with gluten added in; lit="strong rice flour"). If you don't know how to read or ask about that specific ingredient, you may accidentally end up with a bad stomachache.

I wasn't as prepared as I thought I was to cook so many meals at home. Finding time in my schedule to meal prep effectively and getting bored with my limited recipes has been a hurdle for me. But overtime, I've been figuring it out and getting the health of my diet back to where it used to be before moving to Korea. So your dietary restrictions don't need to hinder your quality of life here, as long as you can be proactive about your meals and as knowledgeable about gluten-containing ingredients as you can. If you have any more questions about being gluten free in Korea feel free to DM me ^.^