There are a lot of factors to consider when deciding whether or not you need Gore-Tex for snowboarding. The first is what kind of climate you'll be riding in. If you're in an area with a lot of wet, heavy snow, then Gore-Tex can help keep you dry and comfortable. However, if you're mostly riding in dry conditions, then Gore-Tex may not be necessary.
Another factor to consider is how often you'll be riding in cold weather. If you only ride occasionally in very cold weather, then Gore-Tex may not be worth the investment. However, if you frequently ride in colder conditions, then Gore-Tex can help keep you warm and comfortable.
Ultimately, the decision of whether or not to invest in Gore-Tex for snowboarding comes down to personal preference and your specific needs. If you think Gore-Tex will help improve your riding experience, then it's probably worth the investment. However, if you don't think it's necessary, then you can save some money by foregoing Gore-Tex gear.