I've got a 36" Blackstone Griddle set up for natural gas. I have a fitting on the back of the house for a generator, I plug into that.

Sorry, no pix. Similar to this, $199 when I bought in 2020. 

https://www.lowes.com/pd/Blackstone-Culinary-36-In-Griddle-with-Hood/5001374823?cm_mmc=shp-_-c-_-prd-_-sol-_-bng-_-LIA_SOL_119_Grills-_-5001374823-_-Online-_-0-_-0&ds_rl=1286981&msclkid=9ae409a5e9c71b670a396a7438921655&gclsrc=ds

You don't always get what you go after,but you do get what you wouldn't have got if you didn't go after what you didn't get. Blaze Foley