The phrase "gat on a technicality" is typically used to describe someone who is found guilty of a crime or misdemeanor due to a legal loophole or technicality. However, there are several synonyms that can be used to express a similar sentiment. These include "getting off scot-free," "escaping unpunished," "slipping through the cracks," and "evading justice." Each of these phrases speaks to the idea that someone has managed to avoid being held accountable for their actions, usually due to a legal technicality or other circumstance that has allowed them to escape punishment. Ultimately, these synonyms highlight the frustration that people often experience when they see someone avoid consequences for their actions through a technical loophole or other means.