I don't know if you can access it anymore but where the Elm Fork and West Fork Trinity meets used to be the hot spot for big gator gar. Been many over a hundred pounds caught right there. I know of one that went 160. There was a time when you could drive right to it off of Shady Grove Rd in Irving.
Another place would be at California Crossing levy but I wouldn't go there at night or any other time without carrying concealed. Lot of bad apples been hanging out there lately.
I like running water for gar fishing. I think the bait smell brings them in faster.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!