Your grandfather was a cousin to my dad and uncle. I actually met RTG a couple of times at my uncle's house.
His father was Jose Cuilty, brother to my grandfather, Oscar. Their father was Jose (I think Edmundo was middle) Cuilty. His father was Enrique Cuilty. His father was Gabino Cuilty. His father was Nicolas Cuilty. His father was Tomas Quilty. The spelling was changed from Irish to Spanish. Any history book you research with regards to Mexico (specifically Chihuahua) that mentions the Cuilty name will be a direct descendent of Gabino. If you like any more info you can contact me directly, its not hard to find me through Google.