Can I use a different brand's griddle on my gas grill?
If a griddle fits on your grill and gets hot, it’ll work even if it’s not built for that particular grill. Many grill producers make griddles that’ll either sit in the place of some of the grill grates or go directly on them. When using different griddles and grills, make sure you leave enough space around the griddle for proper airflow. Keep about 4-6 inches between the edges of the griddle and the outer edges of the grill so hot air can escape rather than getting trapped inside and causing overheating.