The term "gat square" refers to a type of metal grid used to cover the entrance of a drain or gutter. The pronunciation of this word is [gæt skwɛː] in IPA phonetic transcription. The "g" in "gat" is pronounced as a voiced velar stop, while the "a" is pronounced as the short "a" sound. The "t" is pronounced as a voiceless alveolar stop, and the "s" in "square" is pronounced as a voiceless alveolar fricative. Overall, the pronunciation of this term is quite simple and easy to remember.