Unless something has changed recently, GZIP is enabled by default. Keep in mind that the Free Hosting servers are crowded (which is a big part of what makes them free). Look at the number of requests your page is making. Consolidate your CSS and JS into as few files as possible. Optimize your images, and reduce those files as well where you can (using spritesheets, etc.). Reconsider any web fonts or client-side analytics you may be using (they're not cacheable and are a major dietary source of slowness). Social media widgets can be a major problem as well. Try using Yslow and PageSpeed to see where your bottlenecks are (hint: it won't be file compression).