Gwadar has definitely come a long way from where it was 5-10 years ago. It is also probably one of the best places in Pakistan fit for a long-term investment. However, the area has witnessed some political unrest in recent times, though it doesn’t seem to have affected the development work. So, please be careful and only invest in projects by known developers with a proven track record.
That being said, Green Palms and Canadian City appear to be good options. Naval Anchorage also held balloting for residential plots earlier this year, so you may want to check it out as well. It would also really help if someone who has invested in these projects could also share their experience.