Thank you so much for the reply! I was able to find many of them for GDevelop, but there are two in particular that I can't seem to find, the "Hell" tileset that is part of the Rogue Adventure series and "Dream" tileset that is part of the Fantasy Dreamland series. Are there any plans to convert these for GDevelop? (My mistake if they are already available and I missed them. )
Hell: https://elvgames.itch.io/hell-16x16-tileset-rogue-adventure
Dream: https://elvgames.itch.io/fantasy-dreamland-extras-dream