Yes, the Gloria sung during Holy Thursday. Traditionally, the bells of the church were rung during the Holy Thursday Gloria then silenced until the Gloria on the Easter Vigil (one of my parents said that as a child, their Vigil dinner, which for Italains rtraditionally contained lots of meat, cheese and eggs, began when they heard the first bells of the church during the Gloria).
In most churches, the bells are silenced. In more traditionalist churches, a wood block is used in place of the bells during the Eurcharistic prayer.
When I was an altar boy, I think I loved Holy Thursday Mass the best. All the servers (and there were usually about 6 of us for that Mass) would be given bells to ring during the Gloria, to supplement the church bells. It also was a very high and solemn Mass at a time when then churches were moving to less formal Masses. We also were able to do a short procession from the Church to the school, with the Hosts for Good Friday.