Vinings, Georgia. Vinings is a census-designated place and an unincorporated town in Cobb County, Georgia, just across the Chattahoochee River from Atlanta. As of the 2010 census, the CDP had a total population of 9,734.
the gulf of Mexico is about 850 miles wide at its widest point. I'm not sure where the widest point is, but i hope this helped. That is all the info I could find to answer your question. I was wondering that same thing to plan a boat trip to Brownsville Texas from where I am now in Ft. Myers Florida.
1 The shortest distance across the Gulf is about 500 miles between the Mississippi Delta and the tip of the Yucatan Peninsula.  The United States and Mexico form the Gulfâs mainland shore, which extends more than 4,000 miles from the Florida Keys to Cabo Catoche, at the northwestern tip of the YucatÃ¡n Peninsula in Mexico.