HINOGYM Gymnastics is very well equipped. Their instructors are well trained. They give hands on instructions to the kids and are always there to spot them so no accidents occur. This gym is very well ran.
HINOGYM Gymnastics sells leotards that are embroidered with "HINOGYM Gymnastics" on them. I bought one for my daughter and she loves to wear it to gymnastics in the United States. All of the kids that attend this gym regularly are in competitions. They are very competitive and have done well against others teams.
Their telephone number is 624-143-4307. If you ask to speak with Rosanna, she speaks English and can tell you what times the classes are for your child's age and gender. Classes are an hour long and are 100 pesos (about $9 USD). They accept cash.
Make sure you take water for your kids. It can be rather hot in the gym since there is no air conditioning.
UPDATE November 2015: Hinogym has relocated. You can contact Rosanna at 624-355-4622 for directions to new location and class information.