"Recognized as one of the top 100 trout streams in America and the southernmost trout stream in the United States, this segment of the Guadalupe River is managed through special fishing regulations and is stocked in the winter months by TPWD and the Guadalupe River Chapter of Trout Unlimited." - Source TPWD
The article does not state if there is a fee (such as those needed to access a State Park) or if a Park Pass was needed but judging by the title these will be public access, no fee or anything specific except maybe a parking fee.
This is good news and I have a feeling my friend Brian is going to be dragging me out at 6am to go fishing.