GTG stands for “Got to go ” or “ Going to go.” It’s a quick and easy way to let someone know that you need to end the conversation or leave the current situation. While it’s commonly used in online messaging and texting, it can also be used in spoken conversations. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.