[Skunkworks] Linux Mint Issues

Happy New Year Skunks, Now I have encountered an issue with Linux Mint "Cinammon" where it claims it does not have enough disk space. It's on dual boot with Windows 8. I have tried using Gparted to format a 300gig partition to ext4 then have the 4GB allocated to mint "extend" to it(and vice versa). That way Mint would have 304GB. Is there any way of making the linux partiton get to the 300gig? Or do I have to get rid of mint? Thanks in advance.