Bring a large pot of salted water to a boil and cook gemelli pasta until al dente, about 8–10 minutes. The pasta should feel firm but cooked through.
Reserve about 1/4 cup of pasta water before draining. Set pasta aside.
Heat olive oil in a large skillet over medium heat until warm and slightly shimmering.
Add garlic and cook for about 1 minute until fragrant and lightly golden. Do not let it brown.
Add cherry tomatoes and sauté for 3–4 minutes until they soften and start to burst.
Add cooked pasta into the skillet and toss well so everything is coated. The pasta should look glossy.
Pour in reserved pasta water and stir to create a light sauce that clings to the pasta.
Mix in parmesan cheese and black pepper until melted and creamy-looking.
Remove from heat and stir in fresh basil just before serving for a fresh finish.