Nah, just a regular noodle ball of nope. Unless they bite you, it gets infected and you choose to ignore it, about the worst a garter snake will do to you is cover whatever part of you is touching them in some stinky piss. Like, leave them alone unless it's absolutely necessary, but garter snakes are pretty chill.

Garter Snakes

Garter snakes were long thought to be non-venomous, but discoveries in the early 2000s revealed that they produce a neurotoxic venom.[12] Despite this, garter snakes cannot seriously injure or kill humans with the small amounts of comparatively mild venom they produce and they also lack an effective means of delivering it. In a few cases, some swelling and bruising has been reported.[13] They do have enlarged teeth in the back of their mouths[14] but their gums are significantly larger and the secretions of their Duvernoy's gland are only mildly toxic.[13][15]