Printing low-tooth-count GT2 pulleys is no fun and requires a lot of trial and error (either in the models themselves or with your slicer) to get a tooth profile that fits. I printed a large 120T toothed pulley as part of a gear reduction just fine but my attempts at a complementary 30T gear did not go well. I could probably have made it work with enough trial/error but I just went with a 30t metal pulley instead.
Even if you can get a good tooth form there are questions of strength, accuracy, and so forth. I agree with Jeffeb3 that the question is “why?”. If there is a good reason to want to try it you can probably achieve some level of success if you put in the time. And remember “because I want to” is a 100% valid reason to try almost any harebrained scheme.