Are there any ALS (Lou Gehrig Disease) support groups for young male
patients with ALS in Hidalgo County, Texas?

In an Internet search, I'm afraid the closest ALS support group I
could locate is in San Antonio, which is quite a long way from Hidalgo
County. Have you considered online support groups?

The patient's neurologist may know of a local group. Support groups
for medical conditions often meet at hospitals, so you might want to
ask area hospitals and clinics whether an appropriate group is
available in your area.