A heavily shackled Garland, 52, appeared on almost 100 charges after five Corrective Services officers escorted him into his Brisbane Magistrates Court hearing.
Twelve witnesses gave evidence at the three-day committal via video link due to concerns that they would be too intimidated by Garland's presence.
The court heard witnesses were "petrified" about being in the same room as him.
One witness required his partner to be present to give evidence after suffering PTSD as a result of Garland's alleged offending, the court heard.
Garland has been committed to stand trial for a total of 73 offences including 17 counts of rape.
The string of alleged offences also include 23 counts of indecent assault by anal intercourse and 10 of assault with intent to commit rape.
Charges also include deprivation of liberty as well as indecent and sexual assault.
Garland is accused of committing the offences in Queensland prisons during a period spanning 1994 to 2014.
Another 23 charges - including 18 counts of rape - were dropped with no evidence to offer.
The court was closed to the public for the majority of the hearing, before acting magistrate Michael Holohan, which concluded on Monday.
Garland will stand trial at a later date.
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