Yes, there have been available gas leases. You can research prospective lessee's production records at the Texas Railroad Commission's website http://(www.rrc.
state.tx.us). There is an article http://www.txfb.org/texasagriculture/2005/020405/020405gasle
that may have more info for you. Most people who are selling their houses today will not sell the mineral rights. You should contact an attorney who works with mineral rights, before getting into any leasing of mineral rights. Contact me if you want info on a particular house or piece of land. (817)201-6792