Not all districts have gifted programs or services. States may vary considerably. Not all States mandate or fund gifted education. Here is a link - http://www.davidsongifted.org/db/StatePolicy.aspx

After checking your State, you may wish to check your district policy and practice statements. Look for any policies and practices which may describe gifted programs or services which they may offer, then, to answer your immediate question, you may wish to look for topics related to "identification".