Is Gross National Happiness a form of GDP?

I am learning about Gross National Happiness as the guiding philosophy of Bhutan, so that search probably led me to this amazing long term chart of GDP.  I guess we in the USA are on an upward trajectory and nearing highs in terms of GDP.  What does GNH have to do with GDP?  Is this the end, are we at a high or top?  Just like happy folks will do, please enjoy the happy days of GDP highs while it lasts.

My estimate is for a jump to the upside over time and we will experience all new highs, in terms of GDP.

In the West we equate rise of GDP in terms of happiness.  But I am learning and interested in Gross National Happiness which is a different measure.  I suppose a strong GDP makes me happy in some ways.  It’s good to be happy. So GNH and GDP are symbiotically related.