The Gonzales flag would be razor wire fashioned into a rattlesnake with the caption “Don’t Tread on Me’. All kinds of neat ideas for flags symbolizing the upcoming confrontation.
I believe you are thinking of the Gadsden Flag. The Gonzales flag is of Texas origin and has the Cannon with Come and Take It on it as well as a single star.
Come and Take It, of course, goes back to the Spartans at Thermopile.