It was there where he would have his first encounter with the medical profession while working as a teacher assistant at the San Juan de Dios hospital.

During this time they became close friends and when Jimenez needed to go to San Luis Potosí for additional treatment he asked Gonzalez Mendoza to come with him.

The fifth student, Blas María Diez finished his under Gonzalez Mendoza and became the first medical graduate of the state of Nuevo León.

[4] In 1851 he was elected president of the local sanitary commission Two years later Gonzalez Mendoza started an obstetrics course that was open to men and women alike.

In 1859 he helped found the Colegio Civil (predecessor to the UANL, the first public university in the region and was named head of the Medical School.

[5] During the first year of the medical school classes were held in a room of what used to be the bishop's house, which was seized by the government during the Reform War.

During the occupation by the French army, Gonzalez Mendoza met Count Liverman, an Austrian physician who was impressed by his efforts to maintain the medical school.

[2] When Monterrey was retaken by the republican army under the command of general Mariano Escobedo the school was allowed to resume normal classes.

Gonzalez Mendoza was in good standing with the republican army after having delivered President Benito Juárez son while he was visiting Monterrey.

Currently he is buried in the grounds of the medical school of the Autonomous University of Nuevo León where a monument was built in his honor.