Wound low G string without truss rod

Hello, I'm new to ukulele and wanted to try out low g tuning on my concern ukulele. I got Aquila super nylgut low g set that says it's for concert size, which has wound strings, and my ukulele doesn't have truss rod. I want to make sure that it's safe to install it. Is tension on low G higher? I have a string-through type bridge, where you pull the strings through the body inside, I don't know if it matters