I believe that the two factors that are not included in real GDP per capita, but are included in another standard of living measurement is the Transfer of Assets and Transactions. For example when people grow their own food in their own garden, their consumption is not added to the GDP. Also giving used things to other people like a friend.
I hope it helps, Regards.
It depends on what kind of indicator you are using. For example, if you use Human Development Index, then there are some factors that are not included in GDP. They are life expectancy at birth, literacy level or schooling. GDP does not take these measures into account because GDP deals with final goods and services and takes into account the measures that define them.
GDP per capita isn't a good measure of the standard of living because their is no attention paid to the price level in GDP per capita. An example for instance; Japan, they have a very high GDP (They are the largest economy in the world.) so their GDP per capita is high. However, the cost of living is also extremely high due to the lack of land area, which leads to a low standard of living.
Hope I helped,