"So you have reached a plateau in your English learning and general classes are not challenging you enough..."
Then maybe one of the Cambridge English examinations is for you. There are a few to choose from: CAE, FCE and PET. GCI run all of these quite regularly. It will definitely improve your knowledge and use of English and will make communication easier and will generally increase your overall confidence in English.
Depending on your circumstances, you could do 4, 6 or 12 week course. Please remember that doing a 4 week course is very intensive and is more suited to people who need to refresh not learn the grammar and vocabulary from scratch and also the workload is immense. Expect to eat, sleep and think only about the Cambridge English Examinations for the 4 weeks.
A 6 week course is less intense but again is more suited to people who are comfortable at a B2 level and a 12 week course is for people who want a slower pace of learning, taking their time to learn at their own pace and having the teacher go through everything in minute detail and still have time to enjoy their life in Galway and explore the country. Our blog Which Exam Preparation Course do I choose will give a more detailed insight of the various length of courses available.
But be aware whatever course you do you will have to work very hard and while teachers do everything they can to keep to you motivated and focused please remember that there will be times when you want to give up or think that you won’t pass. This is totally natural, talk to your teacher and they will help you to overcome the difficulty.