Gilead members are to be hand selected under the new arrangement for selection. Only by invitation. As of 2011 I think?
In a letter dated November 6, 2013, it was announced that a new school will replace the Bible School for Single Brothers (formerly known as the Ministerial Training School, or MTS) as well as the recently formed Bible School for Christian Couples. Single sisters are now welcome at this new training school called, “School for Kingdom Evangelizers.”
In addition to accepting single sisters for the first time, Watchtower is now welcoming older Witnesses after raising its age limit for applicants to 65. Those applying between the ages of 50 and 65 have been told that they must be self-sufficient (meaning they can provide for themselves) and in no need of financial or medical assistance from the organization.
Students of the new school must be prepared to be reassigned to new congregations after graduating.