The phrase "gat handle on" means having control and knowledge over a situation or a problem. There are various synonyms that convey the same sense of understanding and authority, including "grasp", "comprehend", "master", and "tackle". To have "a handle on" means to have a firm grasp on a particular issue, and therefore, some more synonyms that fit this category include "understand", "know", "appreciate", and "realize". Other synonyms for "gat handle on" include "solve", "resolve", "fix" and "settle", as they also express control over a problem or a situation. Ultimately, these synonyms are useful in conveying one's proficiency and faultless expertise in dealing with challenges.