a) A minimum score of 120 in aptitude area EL in Armed
Services Vocational aptitude Battery (ASVAB) tests
10-25S (SATELLITE COMMUNICATION SYSTEMS OPERATOR-MAINTAINER) Page 2 of 4
https://perscomnd04.army.mil/MOSMARTBK.nsf/a3237d3da686...85256cbc006b9266/1... 2/4/2008
administered prior to 2 January 2002.
(b) A minimum score of 116 in aptitude area EL on ASVAB
tests administered on and after 2 January 2002 and prior
to 1 July 2004.
(c) A minimum score of 117 in aptitude area EL on ASVAB
tests administered on and after 1 July 2004.
This is an excerpt from MOS 25S from the MOS Smartbook. You have to meet the score requirement in addition to other requirements like having a clearance. The difference between ST and GT is that one (ST) is your Technical score, and (GT) is your General Technical score. When you took the ASVAB it broke down your scores based on how you did. So look at your ERB, and you will find your scores. You can not reclass into an MOS in which you do not meet the requirements. Here is the link to the MOS Smartbook.
https://perscomnd04.army.mil/MOSMARTBK.nsf/wChapter?Ope...Count=4000&Expand=10