Is the GoPro tripod waterproof?

Yes, all the current models of GoPro are waterproof these days. Like Hero8, Max, Hero7, Hero5. These models don’t need any further protection or casing for waterproofing till the depth of 33 feet or 10 meters. Only the Max model is the exception here. The Max model is waterproof to a depth of just 16 feet or 5 meters.