GCC has full support for the latest revision of the C++ standard, which was published in 2014.
This mode is the default in GCC 6.1 and above; it can be explicitly selected with the -std=c++14 command-line flag, or -std=gnu++14 to enable GNU extensions as well.
I don't know what Mint packages by default, but you can check with gcc --version; alternatively, there's a PPA with Ubuntu toolchain updates that includes gcc-6 - you can find the info here.